A community for students.
Here's the question you clicked on:
 0 viewing
anonymous
 3 years ago
Find surface Area & Volume of the regular pentagonal pyramid
> Click on Attachment
anonymous
 3 years ago
Find surface Area & Volume of the regular pentagonal pyramid > Click on Attachment

This Question is Closed

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0First find the area of the base. The formula is 1/2(perimeter)(apothem)

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0Find that and tell me what you get.

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0Not 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.

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0Find the area of that triangle and multiply it by 5

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0Is that one triangle or all 5?

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0Now add the area of the base that we calculated earlier. That should be the total surface area.

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0What is the area of the base?

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0What is the area of the 5 triangles?

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0First 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

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0If 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.

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0yes. That is the surface area.

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0Now the volume. Fortunately we are partly done with the volume because we already know the area of the base.

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0So 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?

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0That's the slant height. Look at the picture.

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0The slant height is the height of the triangles that make the pyramid.

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0Yes. 1/3(24)=8 so multiply 8 times the area of the base. What do you get?

Mertsj
 3 years ago
Best ResponseYou've already chosen the best response.0That's what I got as well. That would be m^3
Ask your own question
Sign UpFind more explanations on OpenStudy
Your question is ready. Sign up for free to start getting answers.
spraguer
(Moderator)
5
→ View Detailed Profile
is replying to Can someone tell me what button the professor is hitting...
23
 Teamwork 19 Teammate
 Problem Solving 19 Hero
 Engagement 19 Mad Hatter
 You have blocked this person.
 ✔ You're a fan Checking fan status...
Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.