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Mathematics 15 Online
OpenStudy (anonymous):

In the figure below, 0 is the center of the circle and triangle AB0 is equilateral. If the sides of AB0 are the length of 6, what is the length of line BC?

OpenStudy (anonymous):

|dw:1350951742402:dw|

OpenStudy (anonymous):

oh the points of the triangle are supposed to be touching the circle

OpenStudy (anonymous):

" If the sides of AB0 are the length of 6" This sentence is non sense!

OpenStudy (anonymous):

h/o let me check if i typed it correctly

OpenStudy (anonymous):

well i typed and copied it from the problem correctly

OpenStudy (anonymous):

either each side is 2 or each side is 6 units

OpenStudy (anonymous):

but ABC is not equilateral

OpenStudy (anonymous):

BOC triangle is equilateral!

OpenStudy (anonymous):

how did you see/get that

OpenStudy (anonymous):

AO = OC = BO ( radius )

OpenStudy (anonymous):

so it would be 12

OpenStudy (anonymous):

wait but if triangle AB0 is equilateral angle A0B = 60 degrees which would make angle B0C 120 degrees

OpenStudy (anonymous):

hello?

OpenStudy (anonymous):

Yeah, my pic. is incorrect! Since AOB is 60 -> BOC = 120 degree!

OpenStudy (anonymous):

ok so what does that mean for BC it is larger than AC so it must be greater than 6

OpenStudy (anonymous):

Now the angle double => the length is double 2 * 6 = 12 !

OpenStudy (anonymous):

ok thank you

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