Question

Find the surface area of the regular pyramid

Answer 1

The top 3 triangles are the same and the area for a triangle is 1/2 base*height so 3(1/2*6.1*12.2)+(1/2*6.1*5.3)=127.795
Or about 128

Answer 2

I do not know, but I do know the formula.

The formula is: 12pl+B where p represents the perimeter of the base, l the slant height and B the area of the base.