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1.4 Angles and their Measures

1.4 Angles and their Measures. Angles. 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 CAB”. “angle BAC”. “angle A”. Naming Angles. How many angles do you see?. Three angles!. Adjacent Angles.

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1.4 Angles and their Measures

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  1. 1.4 Angles and their Measures

  2. Angles 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 CAB” “angle BAC” “angle A”

  3. Naming Angles How many angles do you see?

  4. Three angles!

  5. Adjacent Angles PQS and SQR are adjacent.

  6. Interior vs. Exterior

  7. Measuring Angles A protractor is used to find the measure of an angle. “The measure of angle BAC is 50 degrees.”

  8. Angle Addition Postulate + =

  9. A B “Two angles are congruent if and only if they have the same measure”

  10. Classifying Angles classification example measure range

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