A seven sided figure would be a heptagon.
A Reuleaux heptagon, is a seven sided figure, but having constant diameter. [As seen in some British Coins]. But a regular heptagon would have seven equal sides that were each straight.
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A triangle with side a: 7, side b: 7, and side c: 7 cm has an area of 21.22 square cm.
You are probably referring to a linear equation. In this case get the variables all on one side. example: 5n + 5 = 3n -2 2n + 5 = -2 2n = -7 n = -7/2 or - 3.5
They are the same for pairs of corresponding sides.
To find the scale factor, you need to compare the corresponding sides of two similar figures. The scale factor is calculated by dividing the length of a side on the larger figure by the length of the corresponding side on the smaller figure. For example, if the larger figure has a side length of 8 units and the corresponding side on the smaller figure is 2 units, the scale factor would be 8 divided by 2, which equals 4.
A heptagon has 7 sides. A regular heptagon has all sides the same length, in this case 19 units long. Thus the perimeter = 7 x 19 units = 133 units.