Khan Academy Static

Related_angles

Here we will understand the meaning of various types of related angles like complementary, supplementary and vertical angles. We will use these concepts to find values of unknown angles.

Checking_for_parallel_lines

There is a simple way to prove that two lines are parallel. If we have a transversal which cuts two lines such that the interior angles are equal to each other, then the two lines are parallel to each other. Let's see how this works!

Pairs_of_lines

Here we will understand the various relationships that a pair of lines can have with each other. We will understand the meaning of parallel lines, transversals, congruent angles, and how to figure out angles between transversal and parallel lines.