Hi I need help for the question below as attached related to Circle. The diagram is in a circle but I never draw a circle here because there is some error. Please help thanks!! The answer given in book is 70

Question

anonymous · Answer

attachment

anonymous · Answer

What are you asking?

anonymous · Answer

the file as attached up there

anonymous · Answer

is it too dark u cannot view it?? to find the X the answer given is 70 i draw it in word file as attached here

anonymous · Answer

ok... i had questions but the picture you posted answered everythig....
can you give me the measure of the central angle?

anonymous · Answer

measure of the angle at "O" ?

anonymous · Answer

u mean wat is my answer or wat the question give? the question never give angle for O but I think should be 120

anonymous · Answer

yes... it is 120 degrees... it is a theorem from geometry...
now since the three sides opposite the central angle are congruent AND are on the circle, each angle angle in the triangle (see picture )should be 40 degrees... agreed?
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anonymous · Answer

yes but now nit find X

anonymous · Answer

oops i know is it 180-40 then 140 divide 2 = 70??

anonymous · Answer

notice that each triangle is an ISOSCELES triangle (highlighted triangle)...|dw:1359828140209:dw|