# 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:

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Math student
Where did the +1 in the r = R / (sqrt(2) + 1) come from?

#### To solve this example are needed these knowledge from mathematics:

Pythagorean theorem is the base for the right triangle calculator.

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