I believe you are asking for how many Square Feet are in a 15 Foot Circle, So that's What I will answer below:
AREA of a CIRCLE = (pi) x radius2
*where pi = 3.14159 & radius is half the diameter
IF YOU ARE SAYING THE DIAMETER OF THE CIRCLE IS 15 FEET, THE ANSWER IS:
3.14159 x 7.52 = 176.714438 Sq. Feet
IF YOU ARE SAYING THE RADIUS OF THE CIRCLE IS 15 FEET, THEN THE ANSWER IS:
3.14159 x 152 = 706.85775 Sq. Feet
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The circumference of a circle is calculated using the formula C = 2πr, where r is the radius of the circle. In this case, the radius is half of the diameter, so it would be 15 feet. Plugging this into the formula, we get C = 2π(15) = 30π feet. This is approximately 94.25 feet around a 30-foot circle.
The circumference is 47.1 feet.
The circumference of a circle with a diameter of 3 feet is 9.4 feet.
Area of a circle = pi*radius squared
A circle with a diameter of 18 feet has an area of 254.5 square feet.