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If the radius of a circle is tripled, what is the ratio of the area of
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10 Jan 2023, 06:23
10 Jan 2023, 06:23
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84% (01:08) correct
15% (00:45) wrong based on 13 sessions
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If the radius of a circle is tripled, what is the ratio of the area of half the original circle to the area of the whole new circle? (Area of a circle = \(\pi r^2\), where r = radius)
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Re: If the radius of a circle is tripled, what is the ratio of the area of
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21 Jan 2023, 01:37
21 Jan 2023, 01:37
Expert Reply
Pick a real number such as 2
So the radius of the new circle is 6
\(\frac{Area of half of the original circle}{area of the new circle}= \frac{2 \pi }{ 36 \pi} = \frac{1}{18}\)
So the radius of the new circle is 6
\(\frac{Area of half of the original circle}{area of the new circle}= \frac{2 \pi }{ 36 \pi} = \frac{1}{18}\)
Re: If the radius of a circle is tripled, what is the ratio of the area of
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21 May 2024, 00:10
21 May 2024, 00:10
1
if the radius of original circle is 2, then would the area be 4pi? then the ratio would be 4pi/36pi, which would be 1/9?
