Geometry Extra Credit

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Across
  1. 3. circles Circles that have congruent radii.
  2. 4. one half of a sphere.
  3. 5. circles Circles that touch at one point called the point of tangency.
  4. 8. A transformation that involves flipping a shape over a line or point.
  5. 9. polygons Polygons that have congruent corresponding angles as well as proportional corresponding sides.
  6. 10. The difference of the y coordinates over the difference of the x coordinates.
  7. 13. A triangle with 3 congruent sides.
  8. 15. A 2 dimensional drawing of the surfaces of a 3D shape that can be folded to make the 3D shape.
  9. 17. A transformation where a figure slides. Example (x+3,y+4)
  10. 18. A 4 sided polygon with 4 right angles.
  11. 20. A three sided polygon whose angles add up to 180 degrees.
Down
  1. 1. lines Lines that have the same slope and will never intersect.
  2. 2. A triangle that has sides that all have different lengths.
  3. 6. bisector A line that forms a 90 degree angle with a segment at its midpoint.
  4. 7. A triangle that has 2 congruent sides.
  5. 11. A 4 sided polygon with 2 pairs of opposite parallel sides.
  6. 12. The shared endpoint of two sides.
  7. 14. factor Tells how a a figure's size is changed. ( Enlarged or reduced)
  8. 16. A 4 sided polygon with only one pair of parallel sides.
  9. 19. A segment that connects two points on a circle.