Geometry Jeopardy
One board to review a whole geometry unit: angles, triangles, quadrilaterals, circles, area, and solids. Copy it for free and play with phone buzzers.
6 categories, 30 clues, Final Jeopardy. Everyone buzzes in from their phone.
Hosting opens the presenter screen with a join code for everyone's phones. Either way the board is a copy of your own. Free, no account needed.
Every clue on this board
This page is public, so anyone can read the answers — copy the board and swap a few clues before game day.
Angles
- $200
This type of angle measures exactly 90 degrees.
What is a right angle?
- $400
This type of angle measures less than 90 degrees.
What is an acute angle?
- $600
This type of angle measures more than 90 degrees but less than 180 degrees.
What is an obtuse angle?
- $800
This type of angle measures exactly 180 degrees, forming a straight line.
What is a straight angle?
- $1,000
This is the measure of the missing angle in a triangle whose other two angles measure 50 and 60 degrees.
What is 70 degrees?
Triangles
- $200
This type of triangle has three sides of equal length.
What is an equilateral triangle?
- $400
This type of triangle has exactly two sides of equal length.
What is an isosceles triangle?
- $600
This type of triangle has no sides of equal length.
What is a scalene triangle?
- $800
This type of triangle has one angle measuring exactly 90 degrees.
What is a right triangle?
- $1,000
This is the sum of the interior angles of any triangle, measured in degrees.
What is 180 degrees?
Quadrilaterals
- $200
This quadrilateral has four equal sides and four right angles.
What is a square?
- $400
This quadrilateral has two pairs of parallel sides and four right angles, but its sides are not all equal.
What is a rectangle?
- $600
This quadrilateral has four equal sides but angles that are not right angles.
What is a rhombus?
- $800
This quadrilateral has exactly one pair of parallel sides.
What is a trapezoid?
- $1,000
This is the sum of the interior angles of any quadrilateral, measured in degrees.
What is 360 degrees?
Circles
- $200
This is the term for a line segment from the center of a circle to any point on the circle.
What is a radius?
- $400
This is the term for a line segment that passes through the center of a circle and connects two points on the circle.
What is a diameter?
- $600
This is the term for the distance around a circle.
What is the circumference?
- $800
This is the value of pi rounded to two decimal places.
What is 3.14?
- $1,000
This is the circumference of a circle with a radius of 5, expressed in terms of pi.
What is 10 pi?
Perimeter and Area
- $200
This is the perimeter of a rectangle with a length of 6 and a width of 4.
What is 20?
- $400
This is the area of a rectangle with a length of 7 and a width of 5.
What is 35?
- $600
This is the perimeter of a square with sides of length 9.
What is 36?
- $800
This is the area of a triangle with a base of 12 and a height of 5.
What is 30?
- $1,000
This is the area of a circle with a radius of 4, expressed in terms of pi.
What is 16 pi?
Solid Shapes
- $200
This is the number of flat faces on a cube.
What is 6?
- $400
This is the number of edges on a cube.
What is 12?
- $600
This is the number of vertices on a cube.
What is 8?
- $800
This is the name for a solid shape with a circular base that narrows to a single point.
What is a cone?
- $1,000
This is the name for a solid shape with six flat rectangular faces, twelve edges, and eight vertices.
What is a rectangular prism?
Final Jeopardy — Mathematicians
This Greek mathematician organized geometry into definitions, postulates, and proofs in a 13-book work called the Elements.
Who is Euclid?
How to run this board
Geometry review works well as a game because so much of the unit is vocabulary and recognition: angle types, triangle classifications, quadrilateral properties, circle terms, and the perimeter and area formulas that tie them together. A final category on solid shapes brings in faces, edges, and vertices.
Keep a sketch pad under the document camera while you host. Half the value of a geometry board is drawing the counterexample the moment a team overgeneralizes, like the rhombus that is not a square.
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Spotted a clue that's wrong or out of date? Tell us and we'll fix the board. Or start from a blank board and write your own.