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Because if they were parallel but not equal, the other two sides would not be parallel.

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Q: Why must the opposite sides of a parallelogram be equal in length?
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Related questions

A rhombus is a parallelogram?

Yes. A parallelogram has two pairs of opposite sides parallel (and each pair of equal length). A rhombus has two pairs of opposite sides parallel (and each of those pairs of opposite sides are of equal length), thus it is a parallelogram. It is a special case of parallelogram where all four sides are equal in length, not just the opposite pairs.


Are the opposite side of a parallelogram parallel in length?

In parallelogram each two opposite sides are parallel and equal in length


Is a rectangle a parelellagram?

Yes A parallelogram has opposite sides parallel and equal in length. Does a rectangle have opposite sides parallel and equal in length? Yes Thus a rectangle is a parallelogram.


What is the different between a kite and a parallelogram?

Both shapes have 4 sides, two pairs equal in length. In a parallelogram the equal length sides are opposite each other. In a kite the equal length sides are adjacent.


Is a non-rectangular parallelogram with no equal sides possible?

No. By the very definition of a parallelogram, it's opposite sides of are equal length.


Are the opposite sides of a parallelogram equal?

Yes. By definition, opposite sides are equal (i.e. same length) and parallel.


The opposite sides of a parallelogram are both parallel and?

equal in length.


What is the opposite sides of a parallelogram that is both parallel and?

equal in length.


How are opposite sides of a parallelogram?

Congruent (equal in length), and parallel.


What ia a parallelogram?

A parallelogram is a geometric quadrilateral with two pairs of parallel sides. The opposite sides and opposite angles are equal in length.


How do you know if something is parallelogram?

A parallelogram is a four sided shape where each of the two opposite sides are parallel. A consequence of this is that opposite sides are equal in length, and opposite angles are also equal.


Are the opposite sides of a parellelogram parallel?

Yes. A parallelogram is defined as having opposite sides that are parallel and equal in length, and opposite angles that are equal.