Grade 6: Angles Revision

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 right angle?

Back

A right angle is an angle that measures exactly 90 degrees.

Front

How do you classify angles based on their measures?

Back

Angles can be classified as acute (less than 90 degrees), right (exactly 90 degrees), obtuse (more than 90 degrees but less than 180 degrees), and straight (exactly 180 degrees).

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

If one angle in a triangle is 115 degrees, what is the maximum possible measure of the other two angles?

Back

The maximum possible measure of the other two angles is 65 degrees combined, meaning one could be 65 degrees and the other 0 degrees, but they must be positive.

Front

What is the relationship between complementary angles?

Back

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

Front

What is the relationship between supplementary angles?

Back

Supplementary angles are two angles whose measures add up to 180 degrees.

Front

How do you find the measure of a missing angle in a triangle?

Back

To find the measure of a missing angle in a triangle, subtract the sum of the known angles from 180 degrees.

Front

What is a straight angle?

Back

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

Front

What is an acute angle?

Back

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