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

Answer:

The total area of the shape is $120\ cm^{2}$

Step-by-step explanation:

step 1

Find the area of one right triangle

The area of a triangle is equal to

$A=\frac{1}{2}(b)(h)$

we have

$b=4\ cm$

$h=5\ cm$

substitute

$A=\frac{1}{2}(4)(5)=10\ cm^{2}$

step 2

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

so

$A=12(10)=120\ cm^{2}$

Answer 2

Answer:

120 cm

Step-by-step explanation