I am a geometric shape with no beginning and no end. My rotational symmetry is infinite, yet my area can be found using the square of my radius multiplied by a famous irrational constant. What am I?
A circle
A circle has infinite rotational symmetry and its area is calculated as pi times the radius squared (pi * r^2).
About this riddle
Math riddles hide a calculation inside a short story. Pull out the numbers, work out what is being asked, and watch for a trick such as a unit change.
Difficulty: Easy. More like this: Math riddles with answers or try Target 24 for a different kind of puzzle.
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