in a parallelogram RING ,
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in a parallelogram opposite angles are equal ...
angle R = angle N = 70°
adjacent angles are supplementary... i, e.
angle R + angle I = 180
.... 70 + I = 180
I = 180 - 70
I = 110 °
NOW using property
opposite angle I = angle G = 110 °
all angles are....
70°, 70°,110°,110°
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