Question
Construct the 120° angle, using ruler and a pair of compass only.

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| Number of sides | Each exterior angle | Each interior angle |
| (i) 6 | _________ | __________ |
| (ii) 8 | _________ | __________ |
| (iii) ________ | 36° | __________ |
| (iv) _______ | 20° | __________ |
| (v) _________ | _________ | 135° |
| (vi) ________ | _________ | 165° |
| Faces | a | 5 | 20 | 6 |
| Vertices | 6 | b | 12 | d |
| Edges | 12 | 9 | c | 12 |