Answer:
The measurement of Angle ABC is 30°
Step-by-step explanation:
1) Identify the problem
The problem is an Angle Formed Outside of Circle By Intersection
Which is ( Two Tangents)
2) Formula For Angle Formed by Two Tangents
m<ABC= 1/2 (mADC-mAC)
ADC is the major arc and AC is the minor arc.
3) solve For angle B or m<ABC
m<ABC=1/2 (210-150)
m<ABC= 60 ÷ 2
m<ABC= 30°
Hopes This helps!
Have a great Day :D
