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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
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

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Hero
 2 years ago
Best ResponseYou've already chosen the best response.1Do you have the formulas for Area of a Polygon already?

ErinWeeks
 2 years ago
Best ResponseYou've already chosen the best response.1no i dont ! could you tell me the area

ErinWeeks
 2 years ago
Best ResponseYou've already chosen the best response.1what is PA? what would i put there?

mathmate
 2 years ago
Best ResponseYou've already chosen the best response.1Hint: 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.

ErinWeeks
 2 years ago
Best ResponseYou've already chosen the best response.1so it would be B , 875 ?

Hero
 2 years ago
Best ResponseYou've already chosen the best response.1I was just about to show her the long hard way of doing it.

mathmate
 2 years ago
Best ResponseYou've already chosen the best response.1Sorry @Hero for butting in. I think the question was on the proportionality of figures.

Hero
 2 years ago
Best ResponseYou've already chosen the best response.1It was on Area of a Regular Polygon as well

mathmate
 2 years ago
Best ResponseYou've already chosen the best response.1It 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.

Hero
 2 years ago
Best ResponseYou've already chosen the best response.1Yes, I know. I just said that it was the long way. Good job on saving time.

mathmate
 2 years ago
Best ResponseYou've already chosen the best response.1Sorry pal for this time. Hope that won't happen again! :)
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