Question

ABCD is the isosceles trapezoid with legs line AC and base line BC if the length of line AB is 7Y-4 the length of line BC is 4Y -6 and the length of line CD 8Y -18 find the value of Y

Answer 1

The diagonals of isosceles trapezoid are congruent.

So AB=CD
7y-4=8y-18
-y=-14y=14°