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A square pyramid is made up of a base with a side length of 10 inches and faces that are triangles with a height of 12 inches. What is the surface area of the square pyramid?

A. 120 square inches

B. 125 square inches

C. 240 square inches

D. 340 square inches

2 Answers

4 votes

Answer:

The Answer would be D

Explanation:

This Answer would also apply to E2020 test/exam

User Baltekg
by
8.8k points
1 vote

Answer:

The correct option is D

D) 340 inch²

Explanation:

The base of the pyramid is a square with side 10 inch

Area of square base = Length · Width = 10 · 10

Area of square base = 100 inch²

Height of triangle = 12 inches

Base of triangle = 10 inches

Area of triangle = (1/2)(Height)(Base) = (1/2)(12)(10)

Area of triangle = 60 inch²

Total number of triangles in a pyramid = 4

Total Area of 4 triangles = 4 · 60 inch²

Total Area of 4 triangles = 240 inch²

Surface Area = Area of 4 triangle + Area of the square base

Surface Area = 240 inch² + 100 inch²

Surface Area = 340 inch²

User Danny Pule
by
7.7k points

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