# Angles Year 3 & 4

Angles Year 3 & 4 KS2 Maths. Learn about the types of angles, right, acute, obtuse and reflex angles. How to estimate angles wth games & worksheets.

## Pick a level

## Right Angles

Right angles are equal to a quarter of a turn or 90°.

## Looking at angles

Angles can be more than or less than a right angle.

Find the angles in these pictures. Are they more than or less than a right angle?

## Types of angles

There are four types of angles. Right angles we already know about. Acute angles are less than a right angle. Obtuse angles are more than a right angle. However, if they are more than a straight line they are reflex angles.

Still having problems working out what an angle is? Use this chart to help you work it out.

Work out if these angles are right angles, acute, obtuse or reflex angles.

## Estimating angles

If you want to know how big an angle is you can estimate the angle. To do this, use your knowledge of angles that you do know.

**Question:** Estimate the angle below.

Estimate the angle of the direction the ball should travel to go into any one of the six pockets around the border of the snooker table.

How far do you have to rotate the water hose to hit your targets? Play around and find out.

Your job is to set the angle on the rescue launcher. Can you estimate the angles within 5 degrees?.

Take a look around you. Do you notice all the angles?

## Big and small angles

Remember that angles stay the same size if the image is big or small. It doesn't make a difference to the angle.