Question

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

Step1: Identify ray positions

Ray BC points to 0°, ray BA points to 130°.

Step2: Calculate angle measure

Subtract the two positions: $130^\circ - 0^\circ = 130^\circ$.

Answer:

130