I really need help with this question pleases

Aparallelogram has two side lengths of 5 units. three of its sides have equations y = 0, y = 2, y = 2x. find the equation of the fourth side.

What is the product of the radical expression. (7-2square root) (8+2 square root)

What term best describes a line and a point that lie in the same plane? a. congruent b. coplanar c. collinear d. equal