Question

in parallelogram abcd ab = 5x-7 and cd = 3x+1 . Find the length of cd

Answer 1

You should make and label a sketch of the parallelogram. Since opposite sides of a parallelogram are congruent, side AB will have the same length as side CD. We can write and solve the equation 3x+2=5x-2. Once you've found the value of x, you can substitute into the expressions to find the lengths of each side. Side AD will of course be congruent to side BC.