13. In the adjoining figure, ABCD is a parallelogram and EF is a line segment
If ZADE = 32º and ZCDF = 26°, find the measure of ABC
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Step-by-step explanation:
angle ADC= 180-32-26 = 122°
since sum of opposite angles of a parallelogram is 180
angle ADC+angleABC = 180
angleABC = 180-122 = 58°
hence angleABC = 58°
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