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4.2 - Copy

# 4.2 - Copy - 4-2 Measuring Angles A What is the difference...

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4-2 Measuring Angles A) What is the difference between these two? a. 25 = ABC m ABC b. The first one reads as “the measure of 25 = ABC degrees” c. Turn to page 84 and look at the figure d. degree i. The unit of measure is called a degree e. Measure i. the number of degrees in an angle f. We don’t have to use the degree sign when we write the number in our notation because the m takes care of this: ABC m is the number of degrees in the angle B) Postulate 11 (The Angle Measurement Postulate) a. To every angle BAC there corresponds a real number between 0 and 180. b. B A C r BAC m = c. Measure

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i. The number given by the Angle Measurement Postulate C) Postulate 12 (The Angle Construction Postulate) a.
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4.2 - Copy - 4-2 Measuring Angles A What is the difference...

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