Parallel lines, transversals and triangles:
This tutorial shows students the eight angles formed when two parallel lines are cut by a transversal line. There is also a review of triangles in this video.
Proving vertical angles are equal:
In this tutorial, students prove that vertical angles are equal. Students should have an understanding of supplementary angles before viewing this video.
Finding the measure of vertical angles:
Students will use algebra to find the measure of vertical angles, or angles opposite each other when two lines cross. Students should have an understanding of complementary and supplementary angles before viewing this video.
Introduction to vertical angles:
In this tutorial, students will use their knowledge of supplementary, adjacent, and vertical angles to solve problems involving the intersection of two lines.