This lesson consists of providing you with a basic review of the formulas from geometry you will most likely encounter in algebra (and other math classes like trigonometry and calculus). This is NOT a detailed, formal lesson. br br Formulas and concepts covered include: br br Angles (complementary & supplementary) br Triangles (perimeter and area) br Isosceles triangle br Equilateral triangle br Right triangle br The Pythagorean Theorem br Similar triangles br Perimeter and area formulas for Quadrilaterals (square, rectangle, parallelogram, trapezoid). Some diagonal formulas too, where applicable.