Availability, in the context of a computer system, refers to the ability of a user to access information or resources in a specified location and in the correct format.
Defined, the triangle proportionality theorem states that if you draw a line parallel to one of the sides of a triangle that also crosses the other two sides, then that line will divide the two sides in a proportional way.
Encourage the student to use the Triangle Proportionality Theorem to prove the corollary that states that if three or more parallel lines are intersected by two transversals, the transversals are divided into proportional parts by the parallel lines.