Question

Geometry help please

Answer 1

What's the question? Total surface area or lateral surface area?

Answer 2

The area of the base is made up of 6 triangles with base of 10 m and height of
5*sqrt(3) m.
The lareal surface is made up of 6 triangles with base of 10 m and height of 13 m.

Answer 3

Abase = 6 * bh/2 = 6 * (10)(5*sqrt(3))/2
Alateral = 6 * bh/2 = 6 * (10 * 13)/2
Surface Area = Abase + Alateral

Answer 4

390

Answer 5

That's the lateral area 6 * 10 * 13 / 2

Answer 6

Now you need to find the area of the base. You have 6 triangles, each one of them with a base of 10 m and a height of 5*sqrt(3).