# KS2 Maths Lessons: Year 3 Maths

## The Maths Bit!

In this exciting lesson, we will be identifying and comparing angles of different sizes that can be seen in the natural world.

**Prior knowledge:**

1) A **right angle** is an angle measuring exactly 90°.

2) An **acute angle** is an angle that is less than 90°.

3) An **obtuse angle** is angle that is greater than 90° but less than 180°

**Did you know?**

The red deer is Scotland’s largest deer. Males (stags) have large, branching antlers that increase in size as they get older. These impressive antlers can measure up to one metre across and weigh as much as 15 kilograms. During the breeding season, males use their antlers when battling each other.

## Whiteboard Challenges

Look closely at the antlers of this red deer, and you’ll see lots of angles.

**1) Can you see an angle that is close to a right angle?**

**2) How many acute angles can you see?**

**3) How many obtuse angles can you see?**