It is called its order of rotational symmetry depending on its shape as for example a square has rotational symmetry to the order of 4 because it returns to its same shape every time of a turn of 90 degrees and so 360/90 = 4
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No. The sum of the interior angles of any figure is [ 180 degrees x (2 less than the number of sides) ]. Any triangle . . . 180 degrees Any 4-sided figure, including a rhombus . . . 360 degrees Any 5-sided figure . . . 540 degrees Any 6-sided figure . . . 720 degrees . . . etc.
The number of degrees the breaker cam rotates from the time the breaker points close until they open again.
Polygons with more than 12 sides are often referred to by the expression n-gon, where n is the number of sides. For example, a 20-sided figure may be called a "20-gon" and a 100-sided figure may be referred to as "100-gon". Because 10^100 is a special number, a "googol", a polygon with that number sides could be called a "googol-gon". Such a figure would have interior angles that were almost, but not quite 180 degrees.
It is its surface area.
That is called the area.