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Answer to Question #23602 in Analytic Geometry for SURAJ

Question #23602
AB IS THE DIAMETER OF THE CIRCLE AND DE IS A CHORD PARALLEL TO AB. IF ANGLE BAC=20 FIND ANGLE ADC
Expert's answer
Let’s the center of circle will be named O. So, ˂COB=2˂CAB=40° (because ˂COB is central angle, ˂CAB is inscribed angle and they are based on one arc). ˂COA=180°-˂COB=140° (because they are interconnecting).
˂ADC = 180° - ˂COA = 40°
Answer: ˂ADC = 40°

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