... triangle equals the square of the hypotenuse.) 198 Team-LRN Important Symbols, Terminology, Formulas, and General Mathematical Information Important Equivalents Memorizing the following can eliminate ... (l, or L) 1000 liters = kiloliter (kl, or kL) 200 Team-LRN Important Symbols, Terminology, Formulas, and General Mathematical Information Mass — gram Common measures: 1000 milligrams (mg) = gram ... sides parallel Octagon — An eight-sided polygon Team-LRN Important Symbols, Terminology, Formulas, and General Mathematical Information Circles Radius of a circle — A line segment from the center...