daysidelgadosalguero daysidelgadosalguero

31-01-2022
Mathematics

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the radius of a circle is doubled. a . how does the circumference change? b. How does the area change?

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corbomatthew corbomatthew

31-01-2022

Let's say the original radius was "r", so the circumference is 2πr and the area is πr².

Now when you double the radius, the you get a new circle with radius 2r, circumference 2π(2r) = 4πr, and area π(2r)² = 4πr².

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