in a parallelogram ABCD , <A=3<B find all the angles of the parallelogram. in the same parallelogram, if AB=(5x -7) and CD = (3x+1) cm ,find the length of CD
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Answer:
LA+L B = 180 degree
LB = x, LA = 3x
LA+LB =x+3x=180
4x = I80
x = 45 degree
3x = 135 degree
LA = 45 degree
LB = 135 degree
AB = 5x-7
CD=3x+1
AB =CD
5x-7=3x +1
5x-3x=8
2x = 8
x=4
AB = 5x-7=13cm
CD = 3x+1=13cm. Ans
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