Question

A shape is made of 12 right triangles​ of equal size each right triangle has a base of 4cm and a height of 5 cm what is the total area, in a square centimeter, of the shape

A:10
B:60
C:120
D:240

Answer 1

C:120

Explanation:

The area of each triangle is A = 1/2 bh

A = 1/2 (4)*5

A = 10 cm^2

We have 12 triangles

The total area is 12 times the area of 1 triangle

total area = 12 * A triangle

= 12 * 10

=120 cm^2

Answer 2

120 square centimeter. (c)

Explanation:

Total Area = 12 * area of one triangle [area of right triangle = 1/2 * b * h]

= 12 * 1/2 * b * h

= 12 * 1/2 * 4 * 5

= 120 square centimeter.