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2 years ago

Given ab and ac are lines that are tangent to the circle with m

Mathematics

1 answer:

miv72 [106K]2 years ago

4 0

Answer:

Step-by-step explanation:

the opposite angles of the quadrilateral ABDC are supplementary , that is

∠ BDC + 40° = 180° ( subtract 40° from both sides )

∠ BDC = 140°

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