ABCD is a cyclic quadrilateral such that AB is a diameter of the circle circumscribing it and and angle ADC =140°.
Then ang. BAC = ______.
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70
Step-by-step explanation:
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Answer:
Step-by-step explanation:
in a cyclic quadrilateral sum of opposite angles is 180
140 +180-140 + BAC +180-BAC =360
as 140 and BAC cancels out ,
180+180=360
we get a statement. so for all real values of BAC satisfies it.
so BAC lies between 0 and 180 (not equal to 0 or 180).
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