Search "angles"
Measuring angles in degrees
How to measure an angle in degrees
Khan Academy
Angle basics and measurement
494
08:21
Sum of interior angles of a polygon
Showing a generalized way to find the sum of the interior angles of any polygon
Proof: Sum of measures of angles in a triangle are 180
Proof that the sum of the measures of the angles in a triangle are 180
CA Geometry: Deducing angle measures
46-50, deducing the measure of angles
Proof: Vertical angles are equal
Proving that vertical angles are equal
Acute right and obtuse angles
The difference between acute, obtuse and right angles
Khan Academy
Angle basics and measurement
506
05:31
Measuring angles
Using the KA virtual protractor to measure angles
Khan Academy
Angle basics and measurement
493
04:04
Angles formed by parallel lines and transversals
Parallel lines, transversal lines, corresponding angles
Introduction to vertical angles
Figuring out angles at the intersection of two lines
Khan Academy
Angles
477
07:18
