Across
- 1. solid a solid such that all of its faces are congruent regular polygons and the same number of regular polygons meet at each vertex.
- 3. can be used to describe a translation; it is drawn as an arrow.
- 4. a segment connecting two consecutive midpoints of a triangle.
- 5. part of a triangle that is a point where the three altitudes meet, making them concurrent.
- 8. a type of line that intersects at least two other lines.
- 9. a two-dimensional representation of a three-dimensional object.
Down
- 1. a closed three-dimensional figure.
- 2. an infinite strip containing a symmetric pattern.
- 6. seven-piece puzzle made from a square.
- 7. an intersection of a graph with one of the axes.