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kblack

  • 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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  1. lilg132
    • 2 years ago
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    if 35 is the area we want to work out first what each side is because an octogan has eight sides we divide this by 8 35/8 = 4.375 is the length of the sides now it says that the length of the sides is 5 times as long so we multiply this side by 5 to make it 5 times as long 4.375 * 5 = 21.875 now we need to work out the area so we multiply it by 8 because an octogan has 8 sides 21.875 * 8 = 175 cm2

  2. lilg132
    • 2 years ago
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    dont forget to click best response :)

  3. kblack
    • 2 years ago
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    Thank you

  4. lilg132
    • 2 years ago
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    your welcome

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