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1.4 Angles and their Measures
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“angle CAB”“angle BAC” You can use the vertex of an angle to name it… Or, you can use 3 points on the angle with the vertex in the middle… “angle A”
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Naming Angles How many angles do you see?
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Three angles!
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PQS and SQR are adjacent. Adjacent Angles
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Interior vs. Exterior
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Measuring Angles A protractor is used to find the measure of an angle. “The measure of angle BAC is 50 degrees.”
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Angle Addition Postulate +=
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AB “Two angles are congruent if and only if they have the same measure”
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Classifying Angles classification examplemeasure range
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