What Are Planar Figures?PrerequisitesAddition and SubtractionMultiplicationDivisionTrianglesPrerequisitesMultiplicationDivisionWhat Are Planar Figures? The Pythagorean TheoremPrerequisitesMultiplicationDivisionWhat Are Planar Figures?What Is a Triangle?Quadratic EquationsWhat Is a Square Root?QuadrilateralsPrerequisitesMultiplicationDivisionWhat Are Planar Figures?CirclesPrerequisitesMultiplicationDivisionWhat Are Planar Figures?