1. State whether the following angles are acute, obtuse or reflex:
(a) 56° (b) 251° (c) 132° (d) 105° (e) 57°
2. Find the value of the variables. Give an abbreviated reason selected from the following list for each answer:
- Adj. s on st. line add up to 180°.
- s at a pt. add to 360°.
- Vert. opp. s equal.
(a) |
(b) |
(c) |
(d) |
(e) |
(f) |