Q1 of 45 Page 68

Find all the angles in the following figure.

Given: DMP = 135°


We know by proposition 4,


LMC = DMP = 135° (vertically opposite angles (V.O.A))


We know by proposition 1,


DMP + DML = 180°


135° + DML = 180°


DML = 180° - 135°


DML = 45°


LMC = DML = 45° (vertically opposite angles (V.O.A))


BLQ = DML = 45° (Corresponding angles)


ALM = BLQ = 45° (vertically opposite angles (V.O.A))


We know by proposition 1,


ALM + ALQ = 180°


45° + ALQ = 180°


ALQ = 180° - 45°


ALQ = 135°


BLM = ALQ = 135° (vertically opposite angles (V.O.A))


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