3-2: Angle Measure

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3-2: Angle Measure. 3-2: Angle Measure. DEGREE :The unit of angle measure Uses the symbol ˚ PROTRACTOR : A tool for measuring and sketching angles of a given measure. 3-2: Angle Measure. Use a protractor to measure DEF Place the center middle of the protractor on the angle - PowerPoint PPT Presentation

Transcript of 3-2: Angle Measure

Page 1: 3-2: Angle Measure
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DEGREE: The unit of angle measureUses the symbol ˚

PROTRACTOR: A tool for measuring and sketching angles of a given measure.

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Use a protractor to measure DEF◦ Place the center middle of the protractor on the angle◦ Note where the 0 (not the 180) is: top or bottom◦ Measure the other angle using numbers on the same

top/bottom

DEF = 125˚

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Find BXE, CXE, and AXB◦ BXE = ◦ CXE = ◦ AXB =

115˚85˚65˚

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RIGHT ANGLE: An angle with measure of 90˚

ACUTE ANGLE: An angle with measure between 0˚ & 90˚

OBTUSE ANGLE: An angle with measure between 90˚ & 180˚

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Classify each as acute, right, or obtuse angles

obtuse right acute

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The measure for B is 138˚. Solve for x.

5x – 7 = 138 +7 +7

5x = 1455 5

x = 29

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Assignment◦ Worksheet #3-2


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