Study of shapes and spatial relationships. Play Geometry trivia solo to sharpen your knowledge, or challenge a friend head-to-head in Trivia Tango — every question comes with an explanation so you learn as you play. Questions span every level, from easy warm-ups to expert-level stumpers, so there's a real challenge here however much you already know.
A mix of easy, medium and hard — questions run from warm-up to expert, so there's a real challenge at every level. Think you know the answers? Play to find out.
This is the distance around the outside of a circle.
Difficulty: EasyThis quadrilateral has exactly one pair of parallel sides.
Difficulty: MediumThis theorem gives conditions for three points on the sides (or extensions) of a triangle to be collinear.
Difficulty: HardThis four-sided shape has four right angles and four equal sides.
Difficulty: EasyThis term describes two shapes that have the same shape but may differ in size.
Difficulty: MediumThis line from any point P on a triangle's circumcircle, formed by the feet of perpendiculars to all three sides, is always straight.
Difficulty: HardThis line segment connects the center of a circle to any point on its edge.
Difficulty: EasyThis type of angle measures greater than 180 degrees but less than 360 degrees.
Difficulty: Medium