GEOMETRY VOCABULARY

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Across
  1. 1. lines lines that are not parallel and do not intersect in space
  2. 2. a 2-D figure; the set of all points at a given distance from the center
  3. 4. a 3-D geometric figure with polygons or curves for the sides and bases
  4. 6. a quadrilateral with two pair of adjacent congruent sides
  5. 7. 2-D or 3-D figure having all congruent sides and all congruent angles
  6. 8. the top and bottom parallel polygonal faces
  7. 10. angle measuring exactly 180 degrees; makes a straight line
  8. 11. a 3-D figure; the set of all points at a given distance from the center
  9. 12. a quadrilateral with all congruent sides and all congruent angles
  10. 13. interior angles congruent angles formed by two parallel lines cut by a transversal; located on opposite sides of the transversal between the parallel lines
  11. 16. a cone or cylinder with circles for base(s)
  12. 18. meeting at a 90 degree angle
  13. 19. triangle a triangle with three acute angles
  14. 21. of the same size and shape
  15. 24. Theorem the sum of the squares of the legs of a right triangle equals the square of the hypotenuse; a2 + b2 = c2 where c is always the hypotenuse side
  16. 27. the perimeter of a circle
  17. 33. a simple closed two-dimensional shape made of line segments
  18. 34. the distance around a 2-D figure
  19. 35. a line segment connecting two non-adjacent vertices of a polygon
  20. 36. a 3-D geometric figure with an altitude not perpendicular to the base
  21. 37. the height of a 2-D or 3-D geometric figure measured perpendicularly from the center of the top face or point to the center of the base
  22. 38. faces the polygon shapes making up the sides of a polyhedron
  23. 39. a 3-D figure with parallel congruent polygon bases and sides made of parallelograms
  24. 40. a 3-D geometric figure with an altitude perpendicular to the base(s)
Down
  1. 1. triangle a triangle with three sides of different lengths
  2. 2. the point in the middle of the circle or sphere
  3. 3. polygon a line segment connecting any two points of the interior does not go outside the polygon; none of the interior angles is greater than 180 degrees
  4. 5. a quadrilateral with four congruent sides
  5. 7. a parallelogram with a right angle
  6. 9. triangle a triangle with two congruent legs
  7. 14. a cone or cylinder with base(s) that are not circles but ovals or other curvy shapes
  8. 15. triangle a triangle with three congruent sides
  9. 17. exterior angles congruent angles formed by two parallel lines cut by a transversal; located on opposite sides of the transversal outside the parallel lines
  10. 18. a quadrilateral with two pair of parallel sides
  11. 20. angles two or more angles that sum to 90 degrees
  12. 21. a 3-D figure with a circular or non-circular base and rounding sides rising to a point
  13. 22. triangle a triangle with one obtuse angle
  14. 23. curve a closed curve that does not cross itself
  15. 24. a 3-D figure with faces made of polygons
  16. 25. angles two or more angles that sum to 180 degrees
  17. 26. a 3-D figure with circular or non-circular parallel congruent bases and curving sides
  18. 27. angles congruent angles formed by two parallel lines cut by a transversal; positioned on matching "corners" of intersections
  19. 28. the distance from the center to the circle
  20. 29. triangle a triangle with three congruent angles
  21. 30. curve a curve that can be traced without lifting the pencil, has the same starting/stopping points and may cross itself (creates an inside and outside of the curve)
  22. 31. a line segment connecting two points of the interior can go outside the polygon; at least one of the interior angles is greater than 180 degrees
  23. 32. a 3-D figure with a polygon for a base and triangular faces meeting at a point at the top
  24. 34. lines lines that never intersect in a plane