Question

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

A.
90 mm2

B.
160 mm2

C.
60 mm2

D.
120 mm

Answer 1

120 i think

Explanation:

Answer 2

The answer must be
`120\quad m{ m }^( 2 )` since the triangular pyramid has 4 faces and each has an area of 30
`m{ m }^( 2 )` we should multiply that by 4 , so :


`4\cdot 30\quad m{ m }^( 2 )=\quad 120\quad m{ m }^( 2 )`