Answer:
R = 6
C = 38
A = 113
First you need to find the radius, the key term to find the radius is diameter=2⋅radius; therefore the radius r is 122=6 inches.
To find the area of a circle, you need to use the formula A=π⋅r2; therefore, the area A is π⋅62≈113 square inches.
To find the circumference of a circle, you will use the formula C=2⋅π⋅r; therefore, the circumference C is 2⋅π⋅6 ≈ 38 inches.
OR
IF you want to find HOW to find a diameter: The answer is bolded and underlined
The distance from the center to a point on the circle is called a radius. Every circle has an infinite number of possible diameters. The formula for finding the diameter of a circle is two times the radius (2 * radius).
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