Circles on my Head
Geometry
Level
1
Find the radius of the circle whose diameter is five more than it.
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The answer is 5.
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1 solution
Let the radius be 'r'. Then the Diameter = r+5. But Diameter is also equal to twice the radius of the circle. Hence- 2r=r+5 = 2r-r=5 = r=5 Simple. :)