**Tuesday 9th February 2021**

**Complete the quick maths starter.**

- Please work on Paper and show all your working out.
- Time yourself to see quickly and accurately you can get an answer.
- Mark your work by opening up the document below

__DO NOT SPEND MORE THAN 10 MINUTES ON THIS ACTIVITY__

Remember, your maths lesson should only last 1 hour,

unless you want to do more.

Please write the date and WALT at the top of your page.

__09.01.21__

__WALT find the area of triangles ( right angled triangles)__

Yesterday, we were counting squares to work out the area of triangles.

Today we are going to start thinking about other ways we can work out the area of a triangle.

last week, when we were working on the area of rectangles, we used the formula

length x width = area or L x W = A

If you know how to calculate the area of a rectangle, you can find the area of a triangle with no problems!

The area of a triangle is always half the area of a rectangle that has the same height and width.

This is because a triangle can always fit into a rectangle twice, no matter the shape of the triangle.

This video helpfully sums this up. Give it a watch.

https://www.bbc.co.uk/bitesize/articles/z6bq4xs

So the formula we could use to find the area of a triangle is:

(base x height) ÷ 2

You can also write the formula as:

½ x base x height

They both give you the exact same answer since multiplying by a half is the same as dividing by 2.

- Today i would like everyone to watch the video and follow the instructions and activities. The video will take you through the activities step by step.

- Pause the video so you can give yourself enough time to work out each question.

- You will need to worksheet with you when you watch the video because you will answer some of the questions as you go.

Remember perpendicular is when lines meet at a right angle.

- Complete all questions from 1- 7

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