For a complete lesson on perimeter word problems, go to http://www.MathHelp.com - 1000+ online math lessons featuring a personal math teacher inside every lesson! In this lesson, students learn to solve "Geometry" word problems involving perimeters of rectangles and measures of complementary and supplementary angles. Note that if two angles are complementary, they can be represented as x and 90 -- x, and if two angles are supplementary, they can be represented as x and 180 -- x.