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Science & Mathematics by Anonymous 2018-05-18 11:06:14
Social Science
If ARC AB = 130°, calculate the m angle ABC?
5 answers
A. 130° B. 65° C. 195° D. 115°
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Anonymous
B. 65°
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Anonymous
ARC AB = 130°, Angle ABC = (90 - 25)° = 65° Answer choice: B. 65°
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Anonymous
The angle is clearly acute so only one answer from the choices makes sense. Or you can remember the theorem that the angle would end up being half the central angle/arc length. Answer: 65°
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Anonymous
triangle BOA has angles { 130 ,Θ , Θ } so Θ has measure 25...BC is tangent to the circle so angle OBC = 90 ===> x = 65°
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Anonymous
m∠ABC = ½m arc AB = ½*130°= 65°
