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Definition and properties of adjacent angles - those that share a common leg or ray

Definition of an angle.

This website is a worksheet to estimate and measure angles. The answer sheet is there also.

Worksheet with right angle questions and answers.

Explanation and examples of angles along a straight line.

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).

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