Ask your own question, for FREE!
Mathematics 17 Online
OpenStudy (anonymous):

Find the measure of angle BAC

OpenStudy (anonymous):

Trying to attach file for the problem

OpenStudy (anonymous):

OpenStudy (anonymous):

Please someone help.

OpenStudy (mathstudent55):

This is easier than you think.

OpenStudy (mathstudent55):

In a circle, the measure of an arc is equal to the measure of its central angle. (A central angle is and angle whose vertex is the center of the circle.) |dw:1400469268398:dw|

OpenStudy (mathstudent55):

You also need this: In a circle, an inscribed angle has half the measure of its intercepted arc. |dw:1400469420606:dw|

OpenStudy (mathstudent55):

Now look at your case. A central angle of 76 deg intercepts an arc of the same measure, so arc BC has a measure of ______. Inscribed angle BAC has half the measure of its intercepted arc BC. m<BAC is ____.

OpenStudy (anonymous):

Would bc be 76*2=152?

OpenStudy (mathstudent55):

Arc BC has a measure equal to its central angle, <BOC, so arc BC has a measure of 76 deg. Angle BAC has a measure that is half the measure of its intercepted arc. That means that m<BAC = 1/2 * 76 = 38 deg. You multiplied by 2 instead of dividing by 2.

Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!
Can't find your answer? Make a FREE account and ask your own questions, OR help others and earn volunteer hours!

Join our real-time social learning platform and learn together with your friends!