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A biologist is searching for a rare frog in a remote region of Brilliantia. The local villagers claim a single frog lives in a series of four ponds.

They claim ...

A concave polygon can be equilateral. For example, the concave octagon to the right is equilateral.

What is the least number of sides a concave equilateral polygon can have?

A convex quadrilateral has 2 diagonals. A convex pentagon has 5 diagonals. A convex hexagon has 9 diagonals.

How many diagonals does a convex decagon (10 sides) have?

Three points are chosen uniformly at random along the edges of a square. What is the probability a triangle can be formed from these points?

Clarification: The triangle formed should ...

Bob is building a deck for the trading card game, Arcane: The Congregationâ„˘. He's trying to decide how many land cards he should put into his deck. Not enough ...

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