Dictionary for Basic and Intermediate Algebra A | B | C | D | E|F | G | H | I| J | K | L |M |N | O | P | Q | R | S | T | U | V | W |X |Y |Z | How to use this site
 » Basic Skills
 » Topics in Basic & Intermediate Algebra
 » Topic Illustrated using Power Point
 N e w » Topics in Calculus
 Half-closed interval Including only one endpoint but not the other; of the form [a,b) or (a,b] or equivalently . Linear inequalities  System of inequalities Heron's Formula A formula for the area of a triangle , where a, b, c are side of the triangle and . For example, if the sides of a triangle are 7, 5, 4 then  . Height The length from the vertex to the opposite base, or the length between two parallel sides or  parallel face for a polygon or solid. For example, in the following triangle, the height  is drawn. Hexagon A plane figure with six sides. Hypotenuse For a right triangle, the side opposites the right angle is called the hypotenuse. For any right triangle, the Pythagorean theorem asserts that:  (leg 1)2 + (leg 2)2 = (hypotenuse)2