Question

what is the measure of this angle?
120 110 100 90 80 70
130
60
50
140
40
150
30
160
20
170
10
a
180
b
c
0/360
190
350
200
340
210
330
220
320
m∠abc = ?°
230
310
240
300
250 260 270 280 290

Explanation:

Step1: Identify angle sides

Side BC is at 0°, side BA is at 160°.

Step2: Calculate angle measure

Subtract the two positions: $160^\circ - 0^\circ = 160^\circ$.

Answer:

160