Angles

Types of angles

Right angle 90 degrees)

An angle that is smaller than a right angle (90 degrees) is called an acute angle.

An angle that is bigger than a right angle (90 degrees) but smaller than a straight angle (180 degrees) is called an obtuse angle.

Straight angle (180 degrees)

Which of these shapes have acute angles?

Which of these shapes have obtuse angles?

Key:

​

Acute angle

​

Obtuse angle

​

Right angle (90 degrees)

​

One has been done for you.

Task based on task, page 227 NZCM 3A

These sea creatures cross paths with each other over an hour. Draw in each of the angles created from their paths using the key ---->