A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

Find the area of a regular nonagon with an apothem 16.5 inches long and a side 19 inches long. [A] 1410.8 in2 [B] 171.0 in2 [C] 2821.5 in2 [D] 256.0 in2

  • This Question is Closed
  1. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Is this the right formula A=9/\[9/4 a ^{2}(180º/9)

  2. jim_thompson5910
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    You will have 9 triangles that all look like this |dw:1433031577045:dw| they will arrange to form a nonagon

  3. jim_thompson5910
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    find the area of 1 triangle, then multiply that area by 9

  4. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Oh ok

  5. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    And what formula would I use for that?

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    A = 1/2 bh

  7. jim_thompson5910
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yes

  8. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    oh ok! And 19 would be the base, while the 16.5 is the height, correct?

  9. jim_thompson5910
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    correct, what area do you get?

  10. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Um, the final answer would be A right? But the area I got was 156.75

  11. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    And then when I multiplied that by 9, I got 1210,75 which would round up to 1410.8

  12. jim_thompson5910
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    very good, you nailed it

  13. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thank you!

  14. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

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
  • 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.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.