# 8-2 - protractor on the vertex of the angle and turn the...

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Angles Lesson 8-2

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Vocabulary An angle has two sides and a vertex. The sides of the angles are rays. The rays share a common endpoint (the vertex ) Angles are measured in units called degrees .
Types of Angles When lines intersect to form right angles, then they are classified as perpendicular lines.

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Measuring Angles Place the center point of the

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Unformatted text preview: protractor on the vertex of the angle and turn the protractor so that one side lines up with 0 on the inner scale. Measuring Angles (strategy 2) • Place the center point of the protractor on the vertex of the angle. Note where both rays cross the protractor. Subtract the two numbers (from the same scale) Homework Time...
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