±«Óătv

Watch: Calculating the area of triangles

Back to top

How do you calculate the area of a triangle?

A triangle and a rectangle characters standing next to each other.
Image caption,
A triangle is always half the area of a rectangle with the same height and width.

To calculate the area of a triangle, multiply the height by the width (this is also known as the 'base') then divide by 2.

Can you find the area of a triangle where height = 5 cm and width = 8 cm?

5 Ă— 8 = 40 Ă· 2 = 20

The area is 20ł¦łľÂ˛.

A triangle and a rectangle characters standing next to each other.
Image caption,
A triangle is always half the area of a rectangle with the same height and width.
Back to top

Activity 1

Back to top

Activity 2

Back to top

NEW! Play Guardians: Defenders of Mathematica - the Halloween update. game

Experience Mathematica as you’ve never seen it before, with all-new backgrounds and costumes for Halloween. Available for a limited time only. Use your maths skills to save the day before it's too late!

NEW! Play Guardians: Defenders of Mathematica - the Halloween update
Back to top

More on Area and volume

Find out more by working through a topic