Measuring Segments. Point B at coordinate 8 Point A at coordinate 2.

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Presentation transcript:

Measuring Segments

Point B at coordinate 8 Point A at coordinate 2

BA D C E

Measuring Angles

An angle is made of A vertex (a point) and 2 rays with same endpoint (the vertex) A B C

Coordinates Angle measure

0 degree angle 90 degree angle 180 degree angle

Angle Name Angle Measure Description Example Acute Right Obtuse Straight Angle Classification Measure of angle is between 0 and 90 degrees Measure of angle is equal to 90 degrees Measure of angle is between 90 and 180 Measure of angle is equal to 180 degrees

1.Align vertex with center mark on protractor 2.Align bottom of protractor with one of the rays. 3.Read intersection of protractor with other ray. Read small number if angle appears acute Read large number if angle appears obtuse.

Suppose m 1 = 20 o m 2 = 30 o A 1 2 E F What is m EAF ?

#2-4 on worksheet