Question

Leonard made the 3-d shape below for an art project. He wants to paint it blue.

Answer 1

Answer:

90 $cm^{2}$ of blue paint

Step-by-step explanation:

From the given diagram, the sides have the same dimensions and the shape of a triangle.

Area of a triangle = $\frac{1}{2}$ x base x height

Given that, the base of each side = 6 cm, and the height = 10 cm.

Then,

Area of each side of the shape = $\frac{1}{2}$ x 6 x 10

                                              = 30 $cm^{2}$

Since Leonard wish to paint only the 3 sides and not the bottom part of the shape, the amount of paint required can be determined as;

3 x area of each side = 3 x 30

                                   = 90 $cm^{2}$

Leonard would need 90 $cm^{2}$ of paint to paint the sides of the shape.