Question

A shape is made of 12 right triangles of equal size. Each right triangle has a base of 4 cm and a height of 5 cm. What is the total area, in square centimeters, of the shape?

Answer 1

120 cm

Step-by-step explanation

Answer 2

The total area of the shape is
`120\ cm^(2)`

Explanation:

step 1

Find the area of one right triangle

The area of a triangle is equal to

`A=(1)/(2)(b)(h)`

we have

`b=4\ cm`

`h=5\ cm`

substitute

`A=(1)/(2)(4)(5)=10\ cm^(2)`

step 2

To find the total area of the shape multiply the area of one triangle by 12

so

`A=12(10)=120\ cm^(2)`