1. a. acute
b. reflex
c. obtuse
d. obtuse
e. acute
2.
|
a.
|
x = 124° | (Adj.  s on st. line add up to 180o) |
|
b.
|
y = 119° | (Vert. opp. s equal.) |
|
c.
|
z = 141° | (s at a pt. add to 360°.) |
|
d.
|
a = 70° | (Adj. s on st. line add up to 180o) |
|
e.
|
f = 113° | (s at a pt. add to 360°.) |
|
f.
|
l = 97° | (Vert. opp. s equal.) |
| m = 83° | (Adj. s on st. line add up to 180o) |
|
| n = 83° | (Vert. opp. s equal.) |
