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# What is a geometric constraint?

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A geometric constraint is a limitation placed on an object, which can have two dimensions or more, because there are zero degrees of freedom. An object that is fully constrained cannot be geometrically altered; in other words, its angles and side lengths and positions cannot be changed unless the specification of one of the existing dimensions is altered first.

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Geometric constraints are imposed by designating a side length or angle to be a certain value. For example, if two angles of a triangle are specified as 45 and 90 degrees, the third angle is constrained to being 45 degrees. In order to change that third angle, one of the first two angles would have to be changed first.

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A geometric line is a one-dimensional object that extends in a straight direction for an infinite distance. Line segments are often used in drawing and mathematics, and they are a portion of a geometric line that spans from one defined point to another.

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To calculate area, first determine the shape of the object. Next, apply the correct formula is needed, and substitute the values into the appropriate places. Finally, the equation should be solved to find the number that represents the area.

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Density is the mass of an object divided by the volume of space the object takes up. This expression gives the numerical amount of mass per unit volume of the object's material.