Question

Help pls with these two about surface area

Answer 1

6) 152.6

7) 348.4

Explanation:

For question number 6, calculate the surface area of the two triangles first. And then, calculate each of the surface area for the rectangles. Finally, total up the area of the two triangles and the rectangles.

`(6.6 * 9) + (4 * 9) + (5.2 * 9) * ((1)/(2) * 5.2 * 4) = 152.6`

For question number 7, given that the area of a triangle is 28.4. Hence calculate the area of the three rectangles. Lastly, total up the area of two triangles and three rectangles.

`28.4 + 28.4 + 3(12 * 8.1) = 348.4`

Hope this helps =)