Question

Find value of the unknown ...

Answer 1

a = 106, b = 48

Explanation:

The opposite angles of a parallelogram are congruent, thus

∠ A = ∠ C , that is

a = 106

∠ ADB = ∠ DBC ( alternate angles ) , so

b = 48

Answer 2

B=48, A=106

Explanation:

Using A and B as the unknown variables, not the point names.

The lines in the angles of B and D mean that those angles are congruent, or the same. B=D, so B=48. The lines are the same length, as marked with the arrows, which leads to unknown variable A=106, like point A shows.