Mathematics · Geometry

Line segments AD and BE intersect at point C. In triangle ABC, the angle at B is x° and the angle at A is 40°. In triangle CDE, the angle at D is y° and the angle at E is 60°. If x = 100, what is the value of y?

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Line segments AD and BE intersect at point C. In triangle ABC, the angle at B is x&deg; and the angle at A is 40&deg;. In triangle CDE, the angle at D is y&deg; and the angle at E is 60&deg;. If x = 100, what is the value of y?