Diameter = 2 x radius = 10 in.
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A circle's radius is always 1/2 of the circle's diameter, so the radius of a circle of 5-inch diameter is 2-1/2 inches.
Assuming a diameter of 5 inches.The area of this circle is: 19.63
15 ' 8 1/2" The length of the circumference of a 5' diameter circle is 5*pi feet or about 15.7' but as the diameter was only given with one significant figure the answer may only have one significant figure of accuracy so2 times 101 feet
It works out as the square root of 5 or about 2.236 to three decimal places
The diameter of the circle will also be the triangle's hypotenuse so use Pythagoras theorem to find the hypotenuse's length and half the length which will result as a radius of 5 cm.