Across
- 3. Are 90 degrees
- 4. Opposite sides are parallel and equal.
- 6. Each angle is 90 degrees and all sides are equal.
Down
- 1. A four-sided Polygon
- 2. A Greek mathematician known for his theory of triangles
- 4. A simple closed figure made up of line segments.
- 5. The property stating that the sum of all angles in a triangle is 180 degrees.