I need help
d over > 4

In terms of the radius r, the formula for the area A of a circle is:

A = πr²

Since the radius r is one-half the diameter d of a circle, i.e., r = d/2, then substituting into the formula for the area A of a circle, we have:

A = π(d/2)²

A = π(d²/2²) by the "Power of a Quotient" property of exponents, i.e., (a/b)ⁿ = aⁿ/bⁿ, where a and b are real numbers, b ≠ 0, and n is an integer.¹

A = (πd²)/4 is why we may have to divide by 4 when calculating the area of a circle.

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