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OpenStudy (anonymous):
The circle shown below has AB and BC as its tangents. If the measure of arc AC is 140°, what is the measure of angle ABC? a. 60° b. 40° c. 70° d. 50°
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OpenStudy (anonymous):
OpenStudy (mertsj):
Subtract the small arc from the big arc and divide by 2
jimthompson5910 (jim_thompson5910):
hint: these angles are supplementary (ie they add to 180 degrees) |dw:1380163262920:dw|
OpenStudy (anonymous):
is it a?
jimthompson5910 (jim_thompson5910):
x+140 = 180 x = ???
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OpenStudy (anonymous):
oh its b 40 thank you!
jimthompson5910 (jim_thompson5910):
correct, yw
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