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if the corresponding sides of two triangles are proportional, then the triangles are equi-angular and the triangles are similar.
(also called simple depreciation) decay where the amount of decrease remains constant over time...
a function in which the product of x and y remains constant xy = ...
a statistical average; the sum of all the values divided by the number of values.
an algebraic expression that consists of three terms and has the general form ax2...
uses the previous terms of a sequence to compute further terms in the sequence.