HOW and WHY to Fully-Define Sketches in Fusion 360 (2020)

This tutorial teaches you how and why to fully-define your sketches in Fusion 360. This is a foundational concept that all beginners must learn if you want to create proper parametric models.
Fully defining a sketch is done through the use of constraints and sketch dimensions. In this tutorial, I break the concepts down with a simple part example. You'll also learn some tricks and tips to figure out why your sketches aren't yet fully defined, including how to achieve the lock icon.
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TIMESTAMPS
0:00 - Fully-define sketches in Fusion 360
0:30 - Understanding the geometry color
0:57 - What is fully-defining a sketch?
1:30 - Adding constraints to the geometry
2:15 - Finding what's not constrained
3:00 - Testing the constraints
4:00 - Using the symmetry constraint
4:35 - Inspecting the Browser sketch icon
4:56 - What does the lock icon mean?
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QUESTION
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