Angles

Front

What is an obtuse angle?

Back

An obtuse angle is an angle that measures more than 90 degrees but less than 180 degrees.

Front

What is a reflex angle?

Back

A reflex angle is an angle that measures more than 180 degrees but less than 360 degrees.

Front

What is a complementary angle?

Back

Complementary angles are two angles whose measures add up to 90 degrees.

Front

What is a perpendicular angle?

Back

Perpendicular angles are angles that form a right angle (90 degrees) when they intersect.

Front

What is the sum of angles in a triangle?

Back

The sum of the interior angles in a triangle is always 180 degrees.

Front

What is an acute angle?

Back

An acute angle is an angle that measures less than 90 degrees.

Front

What is a straight angle?

Back

A straight angle is an angle that measures exactly 180 degrees.

Front

What is the value of angle n if it is complementary to 37°?

Back

53° (because 90° - 37° = 53°).

Front

What is the value of angle n if it is supplementary to 120°?

Back

60° (because 180° - 120° = 60°).

Front

If angle A is 45°, what is the value of angle B if they are complementary?

Back

45° (because 90° - 45° = 45°).