Geometry Vocabulary

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Across
  1. 4. a point where two rays meet to form an angle
  2. 5. the outer edge measurement of a circle
  3. 6. an angle that measures 180 degrees
  4. 7. angles that share a side
  5. 11. a segment that passes through the middle of a circle to reach the other side
  6. 12. a line segment that runs from the edge of a circle to its center
  7. 13. the formula for the perimeter of a ___________ is 2l + 2w
  8. 14. an angle measuring more than 90
  9. 16. the formula for the area of a _________ is pi x radius x radius
  10. 17. lines that never intersect
  11. 20. the formula for the area of a ____________ is 1/2 base x height
Down
  1. 1. two angles that add up to 90 degrees
  2. 2. angles that are across from one another
  3. 3. lines that intersect and form right angles
  4. 8. equal or the same
  5. 9. the formula for the area of a ____________ is (base 1 + base 2)divided by two x height
  6. 10. two angles that add up to 180 degrees
  7. 15. an angle measuring less than 90 degrees
  8. 18. an angle that measures exactly 90 degrees
  9. 19. the Greek letter representing 3.14
  10. 21. the measurement of the space inside a 2D figure