A community for students. Sign up today!
Here's the question you clicked on:
 0 viewing
 2 years ago
Find the area of a regular pentagon with a side length of 10m. Round to nearest tenth. PLEASE HELP!
 2 years ago
Find the area of a regular pentagon with a side length of 10m. Round to nearest tenth. PLEASE HELP!

This Question is Closed

elleboedefeld
 2 years ago
Best ResponseYou've already chosen the best response.0The study guide is due tomorrow and I have a lot of questions on it! :(

Study23
 2 years ago
Best ResponseYou've already chosen the best response.1So, the area of a regular pentagon, given side length is \(\ \huge \frac{5s^2}{4tan(\frac{180}{5})} \). The side length is s, so replace s with 10. The 5 can be replaced with the number of sides of the shape. A pentagon has 5 sides, so I inserted a 5. Now, its a matter of solving the equation... Do you need help with that?

elleboedefeld
 2 years ago
Best ResponseYou've already chosen the best response.0Let me try solving it first.

Study23
 2 years ago
Best ResponseYou've already chosen the best response.1Okay. I'll solve it, and post your answer when you get it to verify

alexwee123
 2 years ago
Best ResponseYou've already chosen the best response.0dw:1334722501665:dw divide pentagon into 5 equalaterial triangles this way is easier for me

Study23
 2 years ago
Best ResponseYou've already chosen the best response.1@elleboedefeld Did you get an answer?

Study23
 2 years ago
Best ResponseYou've already chosen the best response.1Okay, so @elleboedefeld, I got \(\ \huge \approx 172.1m^2 \).

Study23
 2 years ago
Best ResponseYou've already chosen the best response.1@elleboedefeld No you're not, it takes time to learn new things. Here's what I did:

Study23
 2 years ago
Best ResponseYou've already chosen the best response.1\(\ \huge \frac{5 \bullet 10^2}{4tan(\frac{180}{5})} \) = \(\ \huge \frac{500}{4tan(\frac{180}{5})} \) = Type this into a calculator. I think this is where you might have made a mistake. Type this into your calculator like this: 500/4tan((180/5)). If you don't the calculator will misinterpret what you typed in. Then, after rounding to the nearest tenth, I got \(\ \huge \approx 172.1m^2 \). Do you understand?

elleboedefeld
 2 years ago
Best ResponseYou've already chosen the best response.0Yes! Thank you! :)

Study23
 2 years ago
Best ResponseYou've already chosen the best response.1@elleboedefeld No problem! Good Luck! :D
Ask your own question
Ask a QuestionFind 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.