Question

PLz answer before 11:59 pm

Answer 1

SA = 2520 ft^2

Explanation:

a = 21ft

b = 29ft

c = 20ft

h = 30ft

SA = 2
`A_(B)` + (a+b+c)h

`A_(B)` = s(s﹣a)(s﹣b)(s﹣c)

s =
`(a + b + c)/(2)`

SA= ah + bh + ch +
`(1)/(2)`
`√(-a^4 + 2(ab)^2 + 2(ac)^2 - b^4 + 2(bc)^2 - c4)`

SA= (21 * 30) + (29 * 30) + (20 * 30) +

`(1)/(2)`
`√(-(21)^4 + 2(21 * 29)^2 + 2(21 * 20)^2 - (29)^4 + 2(29 * 20)^2 - (20)^4)`

SA = 2520 ft^2