Brain Teasers
Circle
Imagine a square, with each side 4 cm long, inscribed in a circle. What is the radius of the circle?
Answer
Since each corner is touching the circle, find the hypotenuse using the Pythagorean Theorem:4^2 + 4^2 = x^2
x = Hypotenuse = 5.657
Divide by 2 to get the radius:
Radius = 2.828
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