Geometry! Geometry! Geometry! Crossword

This printable crossword puzzle on the topic of Geometry has 10 clues. Answers range from 4 to 23 letters long. This crossword is also available to download as a Microsoft Word document or a PDF.

The theory behind probability.
The outcome of the first effects the outcome of the second.
Two events that cannot occur at the same time.
Each of the pairs of opposite angles made by two intersecting lines.
Two angles adding up to 180 degrees.
Two angles have a common vertex and a common side.
Extends in both directions and does not end.
Two lines that never touch and are always the same distance apart.
Either of two angles with a sum of 90 degrees.
An angle that equals 90 degrees.