In the parallelogram ABCD, ∠ a = ∠ C, ∠ B = ∠ D, is the quadrilateral ABC a parallelogram Why?

In the parallelogram ABCD, ∠ a = ∠ C, ∠ B = ∠ D, is the quadrilateral ABC a parallelogram Why?


Yes
ABCD is a parallelogram because a, C and D are diagonally opposite to each other



In the parallelogram ABCD, ∠ ADC = 125 °, ∠ CAD = 21 °, ∠ ABC =? Cab =? No graph


ABC=125 CAB=34



In ▱ ABCD, ▱ ADC = 125 °, CAD = 34 °, then ▱ ABC=______ Degree, cab=______ Degree


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As shown in the figure, the quadrilateral ABCD is a parallelogram, ∠ ADC = 125 ° and ∠ CAD = 21 ° to calculate the degree of ∠ ABC and ∠ cab


As shown in the figure, ∵ quadrilateral ABCD is a parallelogram, ∵ ADC = 125 °, ∥ ab ∥ CD, ∵ ABC = ∵ ADC = 125 °, ∵ ADC + ∥ DAB = 180 °, then ∵ DAB = 180 ° - 125 ° = 55 ° and ∵ CAD = 21 ° and