trapezoid
A trapezium has only 1 pair of parallel lines.
I don't know about the relation in the perimeters of a triangle and a parallelogram but if a triangle is on the same base on which the parallelogram is and the triangle is between the same parallel lines of the parallelogram, then the area of the triangle will be half the area of the parallelogram. That is, area of a triangle = 1/2 area of a parallelogram if the triangle is on the same base and between the same parallel lines.
No because a trapezoid has only 1 pair of parallel sides whereby a parallelogram has 2 pairs of parallel sides
If you mean one pair of parallel lines, then you're talking about a trapezoid.
A parallelogram has 1 pair of parallel lines that is also regular. See the related link.
Parallelogram: 2 pairs of parallel lines Trapezoid: 1 pair of parallel lines
It is trapezoid which has only 1 pair of opposite parallel lines of different lengths.
They are both 4 sided quadrilaterals but a trapezoid has only 1 pair of parallel line of different lengths whereas a parallelogram has 2 pairs of parallel lines
One pair of 1 pair of parallel is 2 pairs of parallels. It could be a parallelogram or special cases of polygons with 5 or more sides.One pair of 1 pair of parallel is 2 pairs of parallels. It could be a parallelogram or special cases of polygons with 5 or more sides.One pair of 1 pair of parallel is 2 pairs of parallels. It could be a parallelogram or special cases of polygons with 5 or more sides.One pair of 1 pair of parallel is 2 pairs of parallels. It could be a parallelogram or special cases of polygons with 5 or more sides.
You can't... A rectangle is defined by 2 sets of parallel lines, ans a parallelogram has 1+ sets of parallel lines
It only has 1 pair of parallel sides. a parallelogram has at least 2 pairs of parallel sides.
A quardrilateral with 1 pair of parallel lines and have no equal sides is a trapezium.
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A trapezoid has 1 pair of opposite parallel lines of different lengths
A trapezoid is not a parallelogram because a parallelogram needs 2 pairs of parallel sides. A trapezoid only has 1 pair of parallel sides. Hope that helps :)
No because a parallelogram has 2 pairs of parallel sides while a trapezoid has only 1 pair of parallel sides