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Q: In a quadrilateral ABCD, angle A + angle C = 2*(angle B + angle D). if angle A = 140 degree and angle D = 60 degree, then angle B is? |
| Answer» Q: In a quadrilateral ABCD, angle A + angle C = 2*(angle B + angle D). if angle A = 140 degree and angle D = 60 degree, then angle B is? | |