Grade 6: Angles Revision

Front

What is an angle?

Back

An angle is formed by two rays (sides) that share a common endpoint (vertex).

Front

What is a right angle?

Back

A right angle measures exactly 90 degrees.

Front

What is an acute angle?

Back

An acute angle measures less than 90 degrees.

Front

What is an obtuse angle?

Back

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

Front

What is a straight angle?

Back

A straight angle measures exactly 180 degrees.

Front

How do you calculate the missing angle in a triangle?

Back

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

Front

What is the relationship between complementary angles?

Back

Complementary angles are two angles that add up to 90 degrees.

Front

What is the relationship between supplementary angles?

Back

Supplementary angles are two angles that add up to 180 degrees.

Front

What type of angle is 120 degrees?

Back

120 degrees is an obtuse angle.

Front

What type of angle is 45 degrees?

Back

45 degrees is an acute angle.