Standard

NC.7.G.5

Use facts about supplementary, complementary, vertical, and adjacent angles in a multi-step problem to write and solve equations for an unknown angle in a figure.

​Parts of an angle

​Angles that measure between 0° and 180° are classified as acute, right, obtuse, or straight.

Angle Types

​There are several ways to name an angle

1. Place the center point of the protractor on the vertex of the angle and align one side of the angle with 0°

2. Read the number of degrees where the second side of the angle crosses the protractor

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Measuring Angles

1. How many degrees is this angle

2. Classify the angle

Angle 1

1. How many degrees is this angle

2. Classify the angle

Angle 2

1. ​How many degrees is this angle

2. Classify the angle

Angle 3