What is the surface area of a triangular pyramid if each face has an area of 120 yd2?

A.
30 yd2

B.
360 yd2

C.
480 yd2

D.
600 yd2

Question

What is the surface area of a triangular pyramid if each face has an area of 120 yd2?
 
 A.
30 yd2
 
 B.
360 yd2
 
 C.
480 yd2
 
 D.
600 yd2

anonymous · Answer

he answer depends as to whether you include the base. The base has three sides. Therefore there are three planes rising up from the base to the centre point. 

Without the base, there are three planes, which each have a area of 120 square yards 3 times 120 = 360 square yards. 

With the base, there are four planes, which each have a area of 120 square yards 4 times 120 = 480 square yard

anonymous · Answer

IT'S C.

anonymous · Answer

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