Question

Pls help................

Answer 1

`82,8m^2 = S.A`

Explanation:

Area of a Rectangle:
`hb\:or\:wb = A`

Area of a Triangle:
`(1)/(2)hb; (1)/(2)bh, or\: (hb)/(2) = A`

Need to know

- Two small triangles

- Two big triangles

12m² = Rectangle

26,4m² EACH = Big Triangles

9m² EACH = Small Triangles

`2[9] + 2[26,4] + 12 = 18 + 52,8 + 12 = 82,8`

So, the surface area of the rectangular pyramid is 82,8m².

* The answer is not 85,31 because this rectangular pyramid has two slant heights. If we ONLY had 9 as ONE SLANT HEIGHT, then the answer would have been 85,31, otherwise it is incorrect.

I am joyous to assist you anytime.