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Natalija [7]
3 years ago
8

Point O is the center of this circle, what is mBCA? A) 56 B) 62 C) 72 D) 76

Mathematics
1 answer:
Dennis_Churaev [7]3 years ago
4 0
Answer: B.) 62

sum of interior angles of quadrilateral = 360

lines DB and DA are tangent to the circle, so they're at a right angle to the lines OB and OA respectively. so to find mBOA = 360 - 56 - 90 - 90
so mBOA = 124

mBCA = (1/2)mBOA
mBCA = (1/2)(124)
mBCA = 62°
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