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First find the area of the base. The formula is 1/2(perimeter)(apothem)

Find that and tell me what you get.

177.975

Yes. That's what I got.

|dw:1339278986157:dw|

Find the area of that triangle and multiply it by 5

127.125

Is that one triangle or all 5?

one

5 would be 635.625

Now add the area of the base that we calculated earlier. That should be the total surface area.

SA = 762.75 ?

What is the area of the base?

50.85

i mean 635.625

What is the area of the 5 triangles?

635.625

813.6

yes. That is the surface area.

i got 13361.486

What is the height?

25

That's the slant height. Look at the picture.

24

its 24

The slant height is the height of the triangles that make the pyramid.

Yes. 1/3(24)=8 so multiply 8 times the area of the base. What do you get?

1423.8

That's what I got as well. That would be m^3

thankyou

yw