Geometry Vocabulary

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Across
  1. 2. a 3D shape that has a circle for its base and comes to a point on the top (or bottom if you flip it)
  2. 6. when two lines make a 90 degree angle, and their slopes are opposite reciprocals
  3. 7. the first reason in a proof is always this
  4. 10. spinning a shape clockwise or counterclockwise around a point
  5. 12. sliding a shape up, down, left or right - the shape stays congruent and does not change orientation
  6. 13. when two angles add up to 180 degrees they are _________
Down
  1. 1. flipping a shape over a line to make a mirror image of it
  2. 3. _____ angles are on opposite sides of an intersection of lines and are congruent
  3. 4. alternate ______ angles are on the inside of parallel lines on opposite sides of the transversal and are congruent
  4. 5. same shape and same size
  5. 8. when two lines have the same slope they are _____
  6. 9. half of the diameter of a circle
  7. 11. a 3D shape with 2 bases that are triangles and the sides are rectangles is called a triangular ______