Question

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

Answer 1

Answer: 120 cm²

Explanation:

Let's start by finding the area of one triangle

The formula for finding the area of a triangle is
`A=(hb)/(2)`

Where

A is the area

h is the height (5 for this)

and b is the base (4 for this)

Let's sub in our values and solve.

`A=((5)(4))/(2)\\A=(20)/(2)\\A=10`

Since there are 12 triangles in the shape we must multiply our area for one triangle by 12 to find the total area of the shape

12×10=120