Question

In the adjoining figure, ABCD is a parallelogram. If angle DAB = 60°
and angle DBC = 80°, then find angle CDB​

Answer 1

Answer:

40°

Step-by-step explanation:

Angle C = Angle A = 60°

In a triangle, sum of all angles is 180°

Therefore, Angle D = 180 - 80 - 60 = 40°

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Answer 2

Answer:

40°

Step-by-step explanation:

Triangle DCB is formed

Angle A is equal to angle C which is 60° (opposite angles of parallelogram are equal)

angle CDB = 180-(DBC + BCD)

=180-(80+60)=180-140=40°

By angle sum property