Geometry Vocabulary Crossword Puzzle | Free Printable Worksheet

A quick way to check that middle schoolers actually know the words behind the formulas: angles, lines, polygons, circles, and the solids they measure. Ready to print as a warm-up, a review station, or an early-finisher handout — no prep beyond hitting print.

Printable geometry vocabulary crossword puzzle with clues about angles, lines, polygons, and circles
Geometry vocabulary crossword for middle school, made with buildacrossword.com.
Geometry vocabulary crossword puzzle answer key, all answers filled in
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Words used in this puzzle

What figure is formed by two rays that share an endpoint? | ANGLE
What is the point where two sides of a shape meet? | VERTEX
What kind of lines run side by side and never meet? | PARALLEL
What kind of lines cross to form a right angle? | PERPENDICULAR
What polygon has exactly three sides? | TRIANGLE
What is a closed flat shape made only of straight sides? | POLYGON
What kind of angle measures less than 90 degrees? | ACUTE
What kind of angle measures more than 90 but less than 180 degrees? | OBTUSE
What is the distance from the center of a circle to its edge? | RADIUS
What line segment goes through the center of a circle from edge to edge? | DIAMETER
What is the distance all the way around a circle called? | CIRCUMFERENCE
What is the amount of space inside a flat shape, measured in square units? | AREA
What is the amount of space inside a 3D shape, measured in cubic units? | VOLUME
What is the longest side of a right triangle, across from the right angle? | HYPOTENUSE
What 3D shape has two identical, parallel bases joined by flat faces? | PRISM

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Swap this list for whatever your class is working on right now — transformations, the coordinate plane, or ratios and proportions — the same approach works for any math vocabulary set. Paste the whole list in at once with the bulk-paste option, or add clues one at a time. Print one copy per student with answers hidden, then flip on Show answers and print a second copy for yourself as an answer key. No login, no student accounts, and nothing about your class gets collected or stored.

Perfect for

  • Review before a geometry unit test
  • Math station or partner activity
  • Warm-up during an angles or circles lesson
  • Sub plan for a 6-8 math class