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The circle shown here has area πr2. If its radius is tripled in length its new area will be

The circle shown here has area πr2. If its radius is tripled in length its new area will be
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The circle shown here has area πr2. If its radius is tripled in length its new area will be

User Norie
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Whatever radius number is, triple it, then square it, then multiply it by pi.

User Martin Frey
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