Mathematics
Grade9
Easy

Question

The measure of ∠ADC is __________.

  1. 180°
  2. 31°
  3. 121°
  4. 59°

hintHint:

The consecutive angles of a parallelogram are supplementary.
angle B C D space plus space angle C D A space equals space 180 degree space
angle C D A space equals space 180 degree space minus space space 121 degree
equals space 59 degree

The correct answer is: 59°


    In the question the value of angle DCB is given and we have to find angle ADC.
    The consecutive angles of a parallelogram are supplementary.
    angle B C D space plus space angle C D A space equals space 180 degree space
angle C D A space equals space 180 degree space minus space space 121 degree
equals space 59 degree

    We used the sum of the angle is 180 property to find the angle ADC

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