quadrilateral

...BC. DB is perpendicular to AC? Find the following if AB = 5x - y, AD = y + 2, BC = 3x + y, CD = 4y - 3x 1. Find x 2. Find y. 3. Find the length of AB. 4. Find the length of BC. With solution please. It so confusing... Thanks in advance ;D

...produced at q.? you need to prove that p+q=1/2 abc+adc here p,q,abc,adc refers to the angles.i am sorry that i am not able to send the diagram

...angles at P.PL is ...? ABCD is a cyclic quadrilateral. Diagonals of ABCD (ie.,AC & BD) meet at right angles at P.PL is a perpendicular bisector to chord AB. If PL is extended to meet chord DC at M, show that PM bisects DC.