# Angles

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 Definition of 'altitude' and the various different ways the word is used in geometry Math Open Reference Gives examples of problems with intercepted arc, central angle, and angles inside and outside the circle. Online Math Learning Identify the missing angle measurement in each set of supplementary angles. Answers included. Math-Drills.com Identify the missing angle measurement in each set of complementary angles. Answers included. Math-Drills.com Explanation of acute angles Math is Fun Similar triangles - two sides in same proportion, included angle the same. SAS Math Open Reference In this Early Edge video lesson, you'll learn more about Triangles, so you can be successful when you take on high-school Math & Geometry. The Princeton Review Definition of a subtended angle - the angle created by an object at a given external point Math Open Reference Similar triangles - all three sides in same proportion. SSS Math Open Reference Definition of a segment of a circle. Math Open Reference
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