Find surface Area & Volume of the regular pentagonal pyramid ------> Click on Attachment

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Find surface Area & Volume of the regular pentagonal pyramid ------> Click on Attachment

Mathematics
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1 Attachment
First find the area of the base. The formula is 1/2(perimeter)(apothem)
Find that and tell me what you get.

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Other answers:

177.975
Yes. That's what I got.
Not we have to find the area of one of those triangles and multiply by 5. I'll draw a picture. We know the base is 10.17 and the slant height is the height of the triangle.
|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
First find the area of the base. The formula is 1/2(perimeter)(apothem)12 minutes ago •Report Abuse Delete 99 Mertsj 0Find that and tell me what you get.11 minutes ago •Report Abuse Delete 43 richardlong369 Best Answer 0177.975
If you look back through the posts you will find the area of the base and the area of the 5 triangles. Add them together to get the total area.
813.6
yes. That is the surface area.
Now the volume. Fortunately we are partly done with the volume because we already know the area of the base.
So find that number. The area of the base. To find the volume multiply these 3 numbers: 1/3, the area of the base, and the height of the pyramid which is shown in the picture to be what?
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

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