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If you mean "triangle", a triangle can never have two parallel sides.

If you mean "triangle", a triangle can never have two parallel sides.

If you mean "triangle", a triangle can never have two parallel sides.

If you mean "triangle", a triangle can never have two parallel sides.

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If you mean "triangle", a triangle can never have two parallel sides.

Q: Are all teiangles have opposite sides that are parallel?

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A square's opposite sides are parallel and all the sides are congruent.

A four-sided polygon with opposite sides parallel and all sides congruent is a square.

This is called a Parallelogram. Each pair of opposite sides will then be the same length. If all four sides are the same length, and opposite sides are parallel, then it is a rhombus. NB: If all four sides are the same length then the opposite sides must be parallel.

Yes it does. All the four sides have an opposite. The opposites are parallel so in a parallelogram there are two pairs of parallel sides.

Square. Square is a quadrilateral and all sides are equal and opposite sides are parallel, the sum of the interior angle measure 3600.

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A square's opposite sides are parallel and all the sides are congruent.

Yes opposite sides are parallel in a rectangle

A four-sided polygon with opposite sides parallel and all sides congruent is a square.

This is called a Parallelogram. Each pair of opposite sides will then be the same length. If all four sides are the same length, and opposite sides are parallel, then it is a rhombus. NB: If all four sides are the same length then the opposite sides must be parallel.

Quadrilaterals that have parallel opposite sides (assuming that each side is parallel to its opposite): A parallelogram A rectangle A square (really a rectangle with all sides equal in length)

Yes it does. All the four sides have an opposite. The opposites are parallel so in a parallelogram there are two pairs of parallel sides.

opposite sides are parallel opposite sides congruent opposite angles are equal opposite lines parallel 1 pair opp. lines parallel and congruent

Square. Square is a quadrilateral and all sides are equal and opposite sides are parallel, the sum of the interior angle measure 3600.

All 4 sides are congruent and opposite sides are parallel to each other.

All sides of a trapezoid cannot be congruent, all sides of a rhombus are congruent. All opposite sides of a rhombus are parallel, only 1 pair of opposite sides of a trapezoid are parallel, the other pair are cannot be parallel.

A square and a rhombus both have all sides equal and opposite sides parallel.

Take your pick: square, rectangle, rhombus or parallelogram which all have opposite parallel sides