Question

if □ABCD is parallelogram angle A and angle B is 7:2 finde angle A​

Answer 1

In the given figure, ABCD is a parallelogram in which ∠=70

0

. Calculate ∠B,∠C and ∠D.

Answer:

In a parallelogram, opposite angles are always equal.

⇒∠A=∠C and ∠B=∠D

as ∠A=70

o

⇒∠C=70

o

Also ∠A+∠B+∠C+∠D=360

o

⇒∠B+∠D=360

o

−140

o

⇒2∠B=220

o

⇒∠B=110

o

⇒D=110

o