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What is the radius of a circle that has an area of 706.5?
15 units (to 2 dp)
What is the surface area of a sphere with a radius of 15 units?
The surface area of a sphere with a radius of 15 units is 2,827 units2
A circle centered at the origin runs through the point 8 15 What is the radius of the circle?
17
What is the area of the semi circle 30 feet?
Is the 30ft the radius or the diameter. The area of a circle = Pi x (radius squared), so, if the diameter is 30ft, making the radius 15ft, the area would be Pi x(15 squared) square feet, and the area of its semicircle would be half of that, so the area required = Pi x (15 squared) divided by 2 = 353.429 sq ft On the other hand, if the diameter is 15ft, making the radius 7.5ft then the area required = Pi x (7.5 squared) sq ft for the full circle and half as much for the semicircle = 88.3573 sq ft As an extra; you will find that the area of the smaller semicircle is exactly one quarter of that of the larger semicircle, and I wonder if you can reason out why that is so.
What is the circumference of a 15 feet diameter circle?
47.14285714285714 radius = 1/2 of diameter radius=7.5 which is half of 15 using circumference of circle formula (2 * by pi * by radius) pi=22/7 2*22/7*7.5=47.14285714285714
