Across
- 3. A polygon with three sides, interior angles have a sum of 180 degrees, length of any two sides of a triangle must greater than the third side
- 6. Two angles with a common side and a common vertex
Down
- 1. Two angles that have a sum of 180 degrees
- 2. Two angles that have a sum of 90 degrees
- 4. Pairs of opposite angles formed by intersecting lines
- 5. Figures having the same size and same shape