Across
- 3. A plane figure with four equal sides and four right angles.
- 6. A way of arranging identical plane shapes so that they completely cover an area without overlapping.
- 7. A figure whose sum of all the angles gives 180 degrees.
Down
- 1. A synonym of corner in mathematics.
- 2. In geometry, a figure of five sides and five angles.
- 4. The pentagon tiles are all ....
- 5. Who founded the 15th type of pentagonal tiling.