How do you feel about angles? They're all around us if you think about it. Why not take a look around and see how many you can see?

**What's an angle? **An angle can be found anywhere that two straight lines meet. It's the space in the middle of the two lines.

Look at this pencil - the lead showing at the end could represent an angle for example!

To be able to feel confident when dealing with angles we need to learn a few key rules. You can come back to this at any time, or, you may find it useful to write these down!

**Rules of Angles**

**Angles at a point add to 360****°**, but what does this mean? Take a look below, you can see the point is where the two lines meet. If we were to continue drawing around the whole point you will see that we've drawn a ... circle? This leads us to our next rule...

**Angles inside a circle add up to** **360****° **it's a rule you just need to learn!

**Angles on a straight line add to 180° **this is a rule we just have to learn. If you take a protractor to any straight line and measure the angle on it, you will find it always equals **180°**, which is half the angle in a circle.

**Have a look at the ways we can calculate angles below.**

If we know one of the angles at a point, or on a straight line, we can calculate the other one based on the rules above.

**Examples**

__ At a point__: - the angle adds up to 360 °

a + 270° = 360°

a = 90°

__ On a straight line__:

b + 65° = 180°

b = 115°