Question

In a parallelogram ABCD, determine the sum of angles LC and LD

Answer 1

∠A = ∠C & ∠D = ∠B [ opposite angle of parallelogram are equal ]

∠A + ∠B + ∠C +∠D = 360°[ Angle sum property of quadrilateral ]

2∠C + 2∠D = 360°

2(∠C + ∠D ) = 360°

∠C + ∠D = 360/2

∠C + ∠D = 180°