| Less acute angles | Same number of acute angles | More acute angles |
More obtuse angles | | | |
Same number of obtuse angles | | | |
Less obtuse angles | | | |
60°
60°
120°
120°
Instructions: Using the diagram in the middle box, complete the remaining boxes trying to make the minimal change possible.
| Less acute angles | Same number of acute angles | More acute angles |
More obtuse angles | | | |
Same number of obtuse angles | | | |
Less obtuse angles | | | |
60°
60°
120°
120°
30°
30°
100°
100°
100°
60°
100°
100°
100°
60°
150°
150°
20°
20°
100°
100°
100°
20°
120°
120°
40°
40°
40°
70°
70°
70°
150°
60°
60°
240°
60°
Note this is zero obtuse angles
300°
One possible solution