A community for students.
Here's the question you clicked on:
 0 viewing
zhane2015
 2 years ago
The area of a regular octagon is 35 cm². What is the area of a regular octagon with sides three times as long? (1 point)315 cm²
175 cm²
225 cm²
105 cm²
zhane2015
 2 years ago
The area of a regular octagon is 35 cm². What is the area of a regular octagon with sides three times as long? (1 point)315 cm² 175 cm² 225 cm² 105 cm²

This Question is Closed

zhane2015
 2 years ago
Best ResponseYou've already chosen the best response.0I just multiply the original area by 3 right??

dave0616
 2 years ago
Best ResponseYou've already chosen the best response.0hmmm, im not sure if that is quite correct. personally i would find the sides of the octagon from the area equation and then redo the problem. Area of a octagon = side^2(2+2(sqrt(2))) 35cm^2=side^2(2+2(sqrt(2)) 35/(2+2(sqrt2)=side^2 7.25=side^2 sqrt(7.25)=side=2.69

dave0616
 2 years ago
Best ResponseYou've already chosen the best response.0i would then multiply each side by 3 and plug that into the equation: 2.69*3=8.07 area=side^2(2+(2sqrt(2)) area=8.07^2(2+(2sqrt(2) area=315cm^2

dave0616
 2 years ago
Best ResponseYou've already chosen the best response.0because each side is 3 times as long

dave0616
 2 years ago
Best ResponseYou've already chosen the best response.0so that is why cant multiply the total area by 3, because it says that each side is 3times as long, not the total area is 3times as big
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.