ABCD is a parallelogram.The ratio of L A and L B of this parallelogram is 5 : 4 find the measure of LB. *
120 °
60°
80 °
40 °
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answer is 80°
because sum of corresponding angles what is 180 degree
show 5 x + 4 x equal to 180
x will equal to 20 degree
angle B is equal to 4 x. (putting value of x)
b is equal to 4 × 20
80°
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