**TI83F* AppVariable file 03/22/07, 10:11 ÿGLM204ÿýnav F441BD13B950415AA7EB861D73925D5FGLM204.GLM2041  area Zarea:ÖThe number of square units needed to cover a surface enclosed by a geometric figure. formula›formula:ÖAn equation that states a rule for the relationship between certain quantities.ÖExample:ÖA = Är^2 is the formula for finding the area of a circle. inverse operations¬inverse operations:ÖPairs of operations that undo each other.ÖExamples:ÖAddition and subtraction are inverse operations. Multiplication and division are inverse operations. linear equationllinear equation:ÖAn equation in the form Ax + By = C, where A  0 and B  0, whose graph is a straight line.  perimeter9perimeter:ÖThe distance around a closed geometric figure.