Math explained in easy language, plus puzzles, games, quizzes, videos and worksheets. For K-12 kids, teachers and parents. read more
The new 2,700-square-foot space feels like a geometric funhouse — quadrilaterals of wood overhead, an enveloping half-circle over the open kitchen, and the hypotenuse of the bar slanting through the lounge. read more
A Watt quadrilateral is a quadrilateral with a pair of opposite sides of equal length. A quadric quadrilateral is a convex quadrilateral whose four vertices all lie on the perimeter of a square. A diametric quadrilateral is a cyclic quadrilateral having one of its sides as a diameter of the circumcircle. read more