| Answer | Crossword Clue |
|---|---|
| OCTANTS | Angles of 45 degrees. |
| NONAGON | A regular one has internal angles of 140 degrees |
| DECAGON | If it's regular, each of its angles is 144 degrees |
| ACUTE | Like angles less than 90 degrees |
| HEXAGON | Its internal angles total 720 degrees |
| NONAGON | Its internal angles total 1,260 degrees |
| OBTUSE | Like angles between 90 and 180 degrees |
| DECAGONAL | Having all angles equal to 144 degrees |
| OCTAGON | A regular one's angles are each 135 degrees |
