Which undefined term can contain parallel lines?

a. line
b. plane
c. point
d. ray

Write an inequality and solve each problem.for exercises 11 and 12, interpret the solution.

The volume of gas a balloon can hold varies directly as the cube of its radius. imagine a balloon with a radius of 3 inches can hold 81 cubic inches of gas. how many cubic inches of gas must be released to reduce the radius down to 2 inches?

The median am of triangle ∆abc is half the length of the side towards which it is drawn, bc . prove that triangle ∆abc is a right triangle, and find angle mac and abm