Question

Which is the BEST estimate for the surface area of the prism?

A) 34 ft2
B) 48 ft2
C) 72 ft2
D) 96 ft2

Answer 1

Answer: The answer is C) 72!

Explanation:

SA = 2ab + 2ac + 2bc, where 'a', 'b' and 'c' are the measurements of the prism

a = 1.8 ≈ 2ft

b = 2.9 ≈ 3ft

c = 5.7 ≈ 6ft

SA = 2(2*3) + 2(2*6) + 2(3*6)

SA = 12 + 24 + 36

SA ≈ 72 ft

Answer 2

C) 72 ft²

Explanation:

Surface area of a prism can be found using the general formula:

SA = 2ab + 2ac + 2bc, where 'a', 'b' and 'c' are the measurements of the prism

a = 1.8 ≈ 2ft

b = 2.9 ≈ 3ft

c = 5.7 ≈ 6ft

SA = 2(2*3) + 2(2*6) + 2(3*6)

SA = 12 + 24 + 36

SA ≈ 72 ft²