Question

DON'T PUT FILES I CAN'T LOOK AT THEM AND THEY GIVE A VIRUS TO MY COMPUTER AND I SPENT 3 HOURS TRYING TO GET IT OUT OF MY COMPUTER
Find surface area if each figure with the given dimensions use 3.14 for Pi
10. cylinder: d = 20mm, h = 37mm
12. rectangular prism: 4 1/2 ft by 6 ft by 11 ft

Answer 1

Answer:

1240.4 mm²

Step-by-step explanation:

The surface area of a pyramid = Area of the all sides + Area of base

Each side is a triangle.

With a regular pentagonal pyramid, the area of each triangle is

For the 5 triangles,

Substituting given values,

Area of base = 440.4 mm²

Surface area of a pyramid = 800 + 440.4 mm² = 1240.4 mm²