How to write expressions for the areas and perimeters of shapes if you do not know all the lengths of the sides.
| September 4, 2021 | education
This means that we accept the parties as unknown and denote them with letters. For example, for the area of a rectangle we have sides a and b, which means that the area will be S = a * b, and the perimeter P = 2 * (a + b).
Further, if there are any additional conditions in the problem, we use them to find the required lengths of the sides of the figure, which we accepted as unknown.
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