The generic length of a 30-60-90 triangle is 2s, so set up an equation 2s=30...divide by 2 and s=15 which is the shortest side opposite of 30. The side opposite of 60 is 15 square root of 2. I hope this make sense and thank you very much for watching:):):)
I just wanted to say thank you! My teacher for my College Algebra class wasn't able to explain the material very well online and finally after watching countless videos online, I finally came across your stuff. I watched you every week, for each new lesson we learned (you had a video for every lesson/technique we learned). After watching your videos I was finally able to understand the math 100%, no one else came close to explaining the material like you do. I told all my classmates and they started watching you too....you saved us all. We are saying BAM now here in Ohio at OSU! Thank you so much for helping me get my A, no way I would have passed if it wasn't for you. You have a talent for teaching/explaining math and it was a pleasure to learn this stuff with you. Thank you so much!
Mrs Tarrou here...What an AWESOME testimonial message christy horton I'm thrilled to hear that these videos have been helping so many of you at OSU and we truly appreciate all the sharing with your classmates...but here is how I see it, how come a school with 63,000 students can't rally together and all subscribe to #ProfRobBob so we can reach this years goal of 100,000 subscribers by 2015?! Another OSU student "akalis13" back in October said he would spread the word but we are still only at 55,000+ There must be some way to post my channel info to a student info board or webpage and/or start a campaign to get them all to watch and SUBSCRIBE before the end of the year...and you look like just the girl who could "MAKE IT HAPPEN" I'm his biggest fan and I promise you, he works very hard at his full-time teaching job in addition to adding new videos and trying to groW this channel AND have a little personal time somewhere included in all that...I'm NOT complaining, just reaching out to students like yourself who have shared their success stories...well, that just makes me want the WORLD to be able to benefit from all the passion and work he puts into his channel! All kidding aside, any and all help would be appreciated whether it's just by sharing this channel with students and teachers and reminding them to like, subscribe, share thru social media, like us on Facebook and keep spreading the word:D I know it will happen in good time...but I'll always remain his BIGGEST fan and support! Thanks for letting me ramble christy horton :)
Professor RobBob,thank you for another amazing video/lecture on Special Right Triangles 45-45-90 and 30-60-90. This material is helpful for students who will be taking Trigonometry in the near future. The Pythagorean Theorem is an important theorem that students should be learning in this process.
If you look at the triangle in the right side of the diagram you will notice little hash marks on the two legs. Those marks mean the two legs are equal and so the right triangle is a 45-45-90 triangle. Thank you very much for watching. I hope I answered your question:)
It is really amazing how, you can review X number of textbooks, videos etc and it just will not stick and then there is just one simple example and it all becomes clear! Example : for a 30,60,90 right triangle with the sides of L√3,L and 2L. Other sources really did make it tricky with making the hypotenuse equal to 1 so the other 2 sides are √3 over 2 and 1/2 . Anyway a big thank you @ProfRobBob for all your videos and how you make subjects that other teachers make difficult really simple. I wish I had your videos when I was in primary and secondary education rather than trying to relearn now im 30! After university etc in order to pass the GMAT. Super resource keep up the good work and making good teaching accessible to everybody!
Heard your message loud and clear! I will spread the word...help you take over the world! Whahaha :) I will help post your stuff with math department and all my friends and incoming students, they need to know about Prof Rob Bob and this resource! Thanks again! Go bucks! :)
That would be AWESOME!!! christy horton I knew you were the right one for the job by that look on your face!!! I forgot to mention he also has a website that has 2 different printable flyers and I would be more than happy to talk to anyone or help from my end:) We truly appreciate your effort and next time we are visiting Grandma in OH maybe we could squeeze in a "guest appearance" since he will be so famous by then...BAM!!! & lol ALSO...I forgot to congratulate you on that "A" with all that ranting...:(sorry NICE JOB on the homework! Go bucks!
When you start solving for C @ 17:15, how do you go from a 30 60 90 to a 90 45 45 triangle? is it b/c since b in the 30 60 90 triangle is 90degrees, then the hypotenuse in C becomes a 45 45 angle?. in another words how did you decide b & C is a 90 45 45 triangle?... i hope I'm being clear in my question. Please help?.... Thanks :)
Most of my friends are jealous because I still 'have" a hairline!...lol Thanks for watching...I've taught on chalkboards for 17 years now and I still love them:)
Professor. I'm a college student and was given a vague word problem and need major help even starting it. If you happen to know how to do this please please help. The problem is as follows: The length of a leg of a Right Triangle is 15 ft. The length of the hypotenuse is 5ft longer than the other leg. Find the length of the hypotenuse and the other leg. Again any help would truly be appreciated.
You're welcome...does that make me the "math wizard" now?!...lol ...if so, please share my wizardry with everyone you know to keep this channel growing and helping others like you...BAM!!!
Right now I am only making videos for Algebra since that is a new class I am teaching this year. If you have not seen my full Geometry playlist you can look here th-cam.com/play/PL668AB35C6885A036.html or here www.profrobbob.com/geometry I also do not know what topics are covered in Geometry 3???
I am trying to share my thought process, and reflect on questions my live students have asked, to make a lesson that is most helpful for my TH-cam viewers.
The generic length of a 30-60-90 triangle is 2s, so set up an equation 2s=30...divide by 2 and s=15 which is the shortest side opposite of 30. The side opposite of 60 is 15 square root of 2. I hope this make sense and thank you very much for watching:):):)
Thanks so much ProfRobBob! You cease to amaze me with your super power of explaining math in easiest way to understand as possible!
I just wanted to say thank you! My teacher for my College Algebra class wasn't able to explain the material very well online and finally after watching countless videos online, I finally came across your stuff. I watched you every week, for each new lesson we learned (you had a video for every lesson/technique we learned). After watching your videos I was finally able to understand the math 100%, no one else came close to explaining the material like you do. I told all my classmates and they started watching you too....you saved us all. We are saying BAM now here in Ohio at OSU! Thank you so much for helping me get my A, no way I would have passed if it wasn't for you. You have a talent for teaching/explaining math and it was a pleasure to learn this stuff with you. Thank you so much!
Mrs Tarrou here...What an AWESOME testimonial message christy horton I'm thrilled to hear that these videos have been helping so many of you at OSU and we truly appreciate all the sharing with your classmates...but here is how I see it, how come a school with 63,000 students can't rally together and all subscribe to #ProfRobBob so we can reach this years goal of 100,000 subscribers by 2015?!
Another OSU student "akalis13" back in October said he would spread the word but we are still only at 55,000+
There must be some way to post my channel info to a student info board or webpage and/or start a campaign to get them all to watch and SUBSCRIBE before the end of the year...and you look like just the girl who could "MAKE IT HAPPEN"
I'm his biggest fan and I promise you, he works very hard at his full-time teaching job in addition to adding new videos and trying to groW this channel AND have a little personal time somewhere included in all that...I'm NOT complaining, just reaching out to students like yourself who have shared their success stories...well, that just makes me want the WORLD to be able to benefit from all the passion and work he puts into his channel!
All kidding aside, any and all help would be appreciated whether it's just by sharing this channel with students and teachers and reminding them to like, subscribe, share thru social media, like us on Facebook and keep spreading the word:D
I know it will happen in good time...but I'll always remain his BIGGEST fan and support! Thanks for letting me ramble christy horton :)
Professor RobBob,thank you for another amazing video/lecture on Special Right Triangles 45-45-90 and 30-60-90. This material is helpful for students who will be taking Trigonometry in the near future. The Pythagorean Theorem is an important theorem that students should be learning in this process.
If you look at the triangle in the right side of the diagram you will notice little hash marks on the two legs. Those marks mean the two legs are equal and so the right triangle is a 45-45-90 triangle. Thank you very much for watching. I hope I answered your question:)
It is really amazing how, you can review X number of textbooks, videos etc and it just will not stick and then there is just one simple example and it all becomes clear! Example : for a 30,60,90 right triangle with the sides of L√3,L and 2L. Other sources really did make it tricky with making the hypotenuse equal to 1 so the other 2 sides are √3 over 2 and 1/2 . Anyway a big thank you @ProfRobBob for all your videos and how you make subjects that other teachers make difficult really simple. I wish I had your videos when I was in primary and secondary education rather than trying to relearn now im 30! After university etc in order to pass the GMAT. Super resource keep up the good work and making good teaching accessible to everybody!
And again...thank you very much for choosing my channel to learn from:)
You're welcome and thanks for liking and subscribing all the way from Canada!
you are a god send. great to have teachers like you.
thanks for watching...please take the time to like, sub and share the free educational channels that you find helpful:D
You helped me understand this way better! Thanks :)
You're welcome Rainboww raven please like, SUBSCRIBE, share and tell your friends/classmates to do the same!
very good explanation keep it up!
Heard your message loud and clear! I will spread the word...help you take over the world! Whahaha :) I will help post your stuff with math department and all my friends and incoming students, they need to know about Prof Rob Bob and this resource! Thanks again! Go bucks! :)
That would be AWESOME!!! christy horton I knew you were the right one for the job by that look on your face!!!
I forgot to mention he also has a website that has 2 different printable flyers and I would be more than happy to talk to anyone or help from my end:) We truly appreciate your effort and next time we are visiting Grandma in OH maybe we could squeeze in a "guest appearance" since he will be so famous by then...BAM!!! & lol
ALSO...I forgot to congratulate you on that "A" with all that ranting...:(sorry NICE JOB on the homework!
Go bucks!
Awesome explanation sir thank you.
Nadia Atem you're welcome, thanks for choosing #ProfRobBob to learn from!
When you start solving for C @ 17:15, how do you go from a 30 60 90 to a 90 45 45 triangle? is it b/c since b in the 30 60 90 triangle is 90degrees, then the hypotenuse in C becomes a 45 45 angle?. in another words how did you decide b & C is a 90 45 45 triangle?... i hope I'm being clear in my question.
Please help?....
Thanks :)
You're a Math Wizard. BAM! ! !
Thank you for sharing your videos :-)
Thanks for your continued support Faith:)
Most of my friends are jealous because I still 'have" a hairline!...lol Thanks for watching...I've taught on chalkboards for 17 years now and I still love them:)
You are a blessing!
k8reed thanks for your continued viewership!
In a 30 60 90 triangle the length of the hypotenuse is 30 Find the length of the shorter leg. i put its 15 radical 2 but its saying 15 please help me
Professor.
I'm a college student and was given a vague word problem and need major help even starting it. If you happen to know how to do this please please help. The problem is as follows: The length of a leg of a Right Triangle is 15 ft. The length of the hypotenuse is 5ft longer than the other leg. Find the length of the hypotenuse and the other leg. Again any help would truly be appreciated.
I got you started and sent you a message through Google+
THANK YOU MERLIN
You're welcome...does that make me the "math wizard" now?!...lol
...if so, please share my wizardry with everyone you know to keep this channel growing and helping others like you...BAM!!!
thank you so much for this i missed some days of school because i was sick and this took a lot of stress away from me :)
You're welcome...glad they could help you get caught up!
See...more math = less stress!!!...lol
Please share and SUBSCRIBE!
This is a great video
+James Goldstein THANKS for watching and subbing...please share this channel with everyone:D
on the second example wouldn't the L be 5?
once again thank you very much sir! :)
i need more video on geometry 3 please thanks
Right now I am only making videos for Algebra since that is a new class I am teaching this year. If you have not seen my full Geometry playlist you can look here th-cam.com/play/PL668AB35C6885A036.html or here www.profrobbob.com/geometry I also do not know what topics are covered in Geometry 3???
thanks you're awesome sir :D
Bam!!! I love it!
+Edith Hernandez thanks for watching...please spread the word:D
Explaining to himself Alone. Never seen
I am trying to share my thought process, and reflect on questions my live students have asked, to make a lesson that is most helpful for my TH-cam viewers.
YOUUUUU son of a bitch thanks for uploading these vids
Wanna see a magic trick?
Poof....
You have one more like
+Edith Hernandez lol...thanks!