Angles

Front

Less than 90° angle

Back

ACUTE

Tags

CCSS.4.G.A.1

Front

Exactly 90° angle

Back

RIGHT

Tags

CCSS.4.G.A.1

Front

Between 90° and 180° angle

Back

OBTUSE

Tags

CCSS.4.G.A.1

Front

Exactly 180° angle

Back

STRAIGHT

Tags

CCSS.4.G.A.1

Front

More than 180° angle

Back

REFLEX

Tags

CCSS.4.G.A.1

Front

Angle that measures 360°

Back

FULL CIRCLE

Tags

CCSS.4.MD.C.5B

CCSS.HSG.CO.A.1

Front

Sum of angles in a triangle

Back

180°

Tags

CCSS.8.G.A.5

Front

Complementary angles

Back

Two angles that add up to 90°

Tags

CCSS.7.G.B.5

Front

Supplementary angles

Back

Two angles that add up to 180°

Tags

CCSS.7.G.B.5

Front

Vertical angles

Back

Angles opposite each other when two lines intersect, they are equal.

Tags

CCSS.7.G.B.5