[Answer] 4. In the formula for the area of the circle, A = pi x r^2, what does r represent?

Step 1 : Introduction to the question "4. In the formula for the area of the circle, A = pi x r^2, what does r represent? "

...1. Rhombus 2. Ratio 3. Radius 4. Rho This formula was known to the ancient Greeks and was derived by Archimedes of Syracuse. In geometry, a radius of a circle is a line from the center of the circle to the perimeter or in other words, half the diameter of the circle.

Step 2 : Answer to the question "4. In the formula for the area of the circle, A = pi x r^2, what does r represent? "

Radius:

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