Angles

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Explanation and example of angles around a point.

This page goes through the definitions and then some practice problems for identifying them

A site that goes through general descriptions of angles and the types of angles, but includes additional interactive construction demonstrations.

Basic overview of supplementary angles

Definition of an acute angle (one less than 90 degrees).

Definition of 'altitude' and the various different ways the word is used in geometry

Gives examples of problems with intercepted arc, central angle, and angles inside and outside the circle.

Explanation of acute angles

Identify the missing angle measurement in each set of supplementary angles. Answers included.

Identify the missing angle measurement in each set of complementary angles. Answers included.

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