M1-T3 Lines and Angles Vocab

Front

Angle measuring 0-90°

Back

Acute Angle

Front

Angle measuring 90-180°

Back

Obtuse Angle

Front

Angle measuring 90 degrees

Back

Right Angle

Front

Angle measuring 180 degrees

Back

Straight Angle

Front

Two angles that add to 90°.

Back

Complementary Angles

Front

Two angles that sum to 180°.

Back

Supplementary Angles

Front

Two angles formed by intersecting lines are congruent.

Back

Vertical Angles

Front

Two angles sharing a common vertex without overlap.

Back

Adjacent Angles

Front

Triangle with one right angle.

Back

Right Triangle

Front

Triangle with 3 equal sides & angles.

Back

Equilateral Triangle