Geometric Properties Crossword

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Across
  1. 3. A quadrilateral with one pair of parallel sides
  2. 4. The number of square units that a two-dimensional shape takes up
  3. 5. The name of this formula: (x₂ - x₁)² + (y₂-y₁)²
  4. 7. The centre point of a triangle is called the _____
  5. 10. Meeting at or tending toward one point
  6. 11. A measure of the steepness of a line: A measure of the steepness of a line: rise/run
  7. 13. The group of three or more than three points that lie on the same straight line
  8. 14. A line segment joining two non-adjacent vertices of a polygon
  9. 16. A point where two sides of a polygon meet
  10. 19. The segment joining a vertex and the midpoint of the opposite side
  11. 20. Two lines that cross at 90°
  12. 21. A line that intersects a line segment at its midpoint at 90°.
  13. 23. Any polygon that has 4 sides, 4 angles and 4 vertices
Down
  1. 1. A quadrilateral with two pairs of opposite sides that are parallel
  2. 2. The ______ is the middle point of a line segment
  3. 6. A triangle with 2 equal side lengths
  4. 8. The line segment joining two points on a curve
  5. 9. Lines which are the same distance apart and never meet
  6. 12. A shape with 3 sides
  7. 15. A triangle with all different sides lengths
  8. 17. A triangle with all equal side lengths
  9. 18. A straight line from the center to the end of a circle
  10. 22. The set of all points in the plane that are an equal distance apart from a fixed point called the center