Question

In parallelogram /B-/A-40* Find all the angles of
parallelogram ABCD.​

Answer 1

Answer:

Step-by-step explanation:

∠B and ∠A are cointerior angles of the paralleolgram so they sum to 180°.

∠B+ ∠A= 180°  - --1

∠B -∠A= 40°  ---2

on adding them ,

2 ∠B= 220 °

∠B=110°

∠A = 180-110°

∠A   =   70°

∠C= 70° ( opposite angles)

∠D= 110° ( cointerrior angles)