From the given diagram, in which ABCD is a parallelogram, ABL is a line segment and E is mid point of BC.Prove that:1) ∆DCE perpendicular to ∆LBE2) AB=BL3) AL=2DC
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1.)according to DCE triangle and BLE triangle, EC=BE EDC angle=BLE angle ECD angle=LBE angle so, DCE triangle perpendicular to BLE triangle. 2.) AB=DC DC=BL SO, AB=BL. 3.) AB=BL=DC AL=AB+BL=DC+DC= 2 DC.
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