Quarter circle

What is the radius of a circle inscribed in the quarter circle with a radius of 100 cm?

Result

r =  41.421 cm

Solution: Leave us a comment of this math problem and its solution (i.e. if it is still somewhat unclear...):

Showing 1 comment: Math student
Where did the +1 in the r = R / (sqrt(2) + 1) come from? To solve this verbal math problem are needed these knowledge from mathematics:

Pythagorean theorem is the base for the right triangle calculator.

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