Question

what is the slant height of a pyramid with surface area of 209 square centimeters and a square base with sides of 7 centimeters? round to the nearest tenth.​

Answer 1

Explanation:

base b = 7

slant height = L

area of base = 49 cm²

lateral area = surface area - base area = 209 - 49 = 160 cm²

area of one lateral face = 160/4 = 40 cm²

½·b·L = 40

L = 80/7 ≅ 11.4 cm