Understanding Types of Angles

Front

Acute Angle

Back

Less than 90°

Front

Right Angle

Back

Exactly 90°

Front

Obtuse Angle

Back

Between 90° and 180°

Front

Straight Angle

Back

Exactly 180°

Front

Reflex Angle

Back

Between 180° and 360°

Front

Congruent Angles

Back

Angles with equal measure

Front

Vertical Angles

Back

Opposite angles formed by intersecting lines

Front

Angle Bisector

Back

Divides an angle into two equal parts

Front

Linear Pair

Back

Adjacent angles forming a straight line

Front

Example of Acute Angle

Back

45°