Quantcast

A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

ErinWeeks

  • 2 years ago

The area of a regular octagon is 35 cm2. What is the area of a regular octagon with sides five times as long? A. 625 cm2 B. 875 cm2 C. 175 cm2 D. 245 cm2

  • This Question is Closed
  1. Hero
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Do you have the formulas for Area of a Polygon already?

  2. ErinWeeks
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    no i dont ! could you tell me the area

  3. Hero
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    \[A = \frac{Pa}{2}\]

  4. ErinWeeks
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    what is PA? what would i put there?

  5. mathmate
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Hint: Area of similar polygons are proportional to the square of the linear dimensions (such as a side). A polygon with a side 5 times as long has an area of 5^2=25 times the smaller polygon.

  6. Hero
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    ^What he said

  7. ErinWeeks
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    so it would be B , 875 ?

  8. mathmate
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Sounds good to me. :)

  9. Hero
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    I was just about to show her the long hard way of doing it.

  10. Hero
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Nice intercept @mathmate

  11. ErinWeeks
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    thank you both !!

  12. mathmate
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Sorry @Hero for butting in. I think the question was on the proportionality of figures.

  13. mathmate
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    yw! :)

  14. Hero
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    It was on Area of a Regular Polygon as well

  15. mathmate
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    It would definitely been beneficial to learn how to calculate the apothem and the length of the side given the area and number of sides. It would be a little long though.

  16. Hero
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Yes, I know. I just said that it was the long way. Good job on saving time.

  17. mathmate
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Sorry pal for this time. Hope that won't happen again! :)

  18. Hero
    • 2 years ago
    Best Response
    You've already chosen the best response.
    Medals 1

    Okay bro

  19. 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.