How many square inches in a 3 inch diameter circle?

Answer 1

Area of a circle = πr²

A = 3.14159 × (4.5)² (remember that r or radius is exactly half of the diameter)

A = 3.14159 × 20.25

A = 63.62 in²

Answer 2

The area of a circle is calculated using the formula A = πr^2, where r is the radius (half the diameter). In this case, the radius is 1.5 inches (half of 3 inches). So, the area of the circle is A = π(1.5)^2 = 7.07 square inches.

Answer 3

When you say "a 20 inch circle", I'm going to assume you mean the distance

all the way across it, through the center ... that is, the circle's "diameter".

The area of a circle is (pi) x (Radius)2 = (pi) x (100) = 314.159 square inches (rounded)

Answer 4

one more times

Answer 5

Approximately 7.068 square inches.

Answer 6

3x3=9 so the answer is 9

Answer 7

6 inches

Answer 8

22