If adjacent angle A and B of parallelogram ABCD are in the ratio 7:5, then find all the angles of parallelogram.
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Let the angles be A=7x and B= 5x
LA+Lb = 180 (adjacent angle )
7x + 5x = 180
12x = 180
x = 180÷12
x = 15
LA= 7x= 7 × 15 = 105
LB =5x = 5 × 15 = 75
opposite angles are equal
LA+Lb = 180 (adjacent angle )
7x + 5x = 180
12x = 180
x = 180÷12
x = 15
LA= 7x= 7 × 15 = 105
LB =5x = 5 × 15 = 75
opposite angles are equal
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