Answer:
a. 115(Looks kinda like 112 or 113 but it says estimate so it should work)
b. around 230
Explanation:
For A I'd say about 100° and for B about 150° (This is just my estimation)
A is almost a right angle but a little more than 90°.
B is almost a straight/flat angle but it's less than 180°.
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