Answer:
77°
Step-by-step explanation:
Angles B and C are adjacent angles of a parallelogram, so are supplementary.
... ∠C = 180° -∠B = 180° -103° = 77°
Answer:
The asnwer is ∠C=77°, ∠BCD= 283°
Step-by-step explanation:
According to the info or the problem angles B and C are adjacent angles of a paralellogram, so those angles are supplementary each other.
We can calculate the angle C applying the supplementary angles theory:
⇒ ∠C = 180° - ∠B = 180° - 103° = 77°.
So angle ∠C = 77°.
In the parallelogram angle B its opposite to D, so ∠D = 103°.
Doing the sumatory of the angles ⇒ ∠BCD= 103°+ 77° + 103°= 283°.
We can corroborate that result its okay because the sumatory of the inner angles of a parallelogram always is 360°.
In conclusion if we add the angle ∠A= 77° (becasuse its opposite to C) to the summation ⇒ 283°+ 77°= 360°.
