Question

Abcd is a parallelogram such that c=100 then find angle a and d

Answer 1

if ABCD is a parallelogram the,

∠B = 100°

∴ ∠D = 100° 

and,

∠A = ∠C = ∠x ( we have let ∠A and ∠C as ∠x )

since opposite angles of a parallelogram is equal. 

and,

∠A +∠B + ∠C +∠D = 360°

since angle sum property of a parallelogram is 360°

∠x + ∠x + 100° + 100° = 360°

⇒2∠x + 200° = 360°

⇒2∠x = 360° - 200°

⇒2∠x = 160°

⇒∠x = 160/2

⇒∠x = 80°

therefore ∠A = 80° and ∠C = 80°

Mark as brainliest please

Answer 2

a=100(opposite angles o parallelogeam ) and b =80