Trapezoid CART has median Line BD.

If the measure of angle C and the measure of angle R =140, find the measure of angle T and angle A.

If TB = 10 and DA = 17, find BC and RD.

If TR = 2x-5, BD = x+4, and CA = 4x-3, find x.

I'm so very confused =/...Please explain how to get to the answer! Thanks so much for any help!