Stuck on these two shapes
need in working out the surface area

Part 1) The surface area of the triangular prism is

Part 2) The surface area of the trapezoidal prism is

Step-by-step explanation:

Part 1) Find the surface area of the triangular prism

we know that

The surface area is equal to

where

B is the area of the triangular base of the prism

P is the perimeter of the base of the prism

L is the length of the prism

Find the area of the triangular base B

Find the perimeter of the base P

substitute the values

Part 2) Find the surface area of the trapezoidal  prism

we know that

The surface area is equal to

where

B is the area of the trapezoid base of the prism

P is the perimeter of the base of the prism

L is the length of the prism

Find the area of the trapezoid base B

Find the perimeter of the base P

substitute the values

yes

yes yes yes

see explanation

step-by-step explanation:

since the sequence is geometric there is a common ratio r between consecutive terms, that is

r = 4 ÷ - 2 = - 2

r = - 8 ÷ 4 = - 2

r = 16 ÷ 8 = - 2

the next term - 13 must be incorrect as it should be - 32 for the sequence to be geometric.

the first 4 terms are therefore geometric with common ratio r = - 2