Geometry Review Vocabulary

1234567891011121314151617181920
Across
  1. 2. 2πr
  2. 6. a line or segment that intersects another line segment at its midpoint and forms a right angle (90 degrees) with it.
  3. 7. the action or condition of becoming or being made wider, larger, or more open
  4. 8. A simple quadrilateral with two pairs of opposite sides parallel and congruent
  5. 10. a geometric transformation where each point is reflected across a designated center point
  6. 12. 1/2 × b × h
  7. 13. a special type of trapezoid where the non-parallel sides (legs) are equal in length
  8. 14. identical in form; coinciding exactly when superimposed
  9. 15. a portion of a straight line defined by two distinct endpoints
  10. 16. √( (x₂ - x₁)₂ + (y₂ - y₁)₂ )
  11. 17. translation, rotation, reflection, and dilation
  12. 18. ((x1 + x2) / 2, (y1 + y2) / 2)
  13. 19. a line over which a figure is flipped to create its mirror image
Down
  1. 1. The different ____ are acute, right, obtuse, straight, and reflex
  2. 3. a transformation in geometry that preserves the shape and size of a geometric figure.
  3. 4. two or more lines that are always the same distance apart and never intersect, even if they are extended infinitely in both directions
  4. 5. two angles add up to 90 degrees
  5. 9. a^2+b^2=c^2
  6. 11. mass/volume
  7. 20. a round solid figure, or its surface, with every point on its surface equidistant from its center