Question

What is the surface area of a triangular pyramid if each face has an area of 30 mm2?



A.


160 mm2


B.


60 mm2


C.


90 mm2


D.


120 mm2

Answer 1

The answer must be 120mm^2 since the triangular pyramid has 4 faces and each has an area of 30 mm^2 we should multiply that by 4 , so :

4 times 30 mm^2= 120mm^2