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The difference between a triangle, rectangle, pentagon, and parallelogram id the number of sides:

Triangle= 3 sides

Rectangle= 4 sides

Pentogon= 5 sides

But, a parallelogram, is a polygon that has all sides parael to one another.

Q: What is the difference between a triangle a rectangle a pentagon and a parallelogram?

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Bigger triangle, a parallelogram or a pentagon.

They are all polygons

Polygon Regular polygon Vertex Triangle Equilateral triangle Isosceles triangle Scalene triangle Acute triangle Obtuse triangle Right triangle Quadrilateral Rectangle Square Parallelogram Rhombus Trapezoid Pentagon Hexagon Heptagon Octagon Nonagon Decagon Circle Convex

No it isn't different because a rectangle is four sided and the corresponding angles are the same length. If you cut part of a rectangle into a triangle and put it on the opposite side it would turn into a parallelogram. You take part of it away and put it on another side that is no difference. So there is no differences about parallelogram and rectangle. (ONLY THE SHAPE OF COURSE.) Hope this helped you! >.<

The same as the number of sides it has. For example, a triangle has 3 of each, a square, rectangle, rhombus, parallelogram, kite, or trapezoid has 4 of each, a pentagon has 5 of each, etc.

Related questions

They are all polygons.

A Pentagon

Bigger triangle, a parallelogram or a pentagon.

Circle. Ellipse. Rectangle. Square. Triangle. Parallelogram. Trapezoid. Losenge. Deltoid. Pentagon. Hexagon. Parabola. That's twelve.

as rectangle is to square I would say Rectangle is to Triangle. Because Hexagon-6sides, pentagon-5 sides, Rectangle-4 sides, triangle 3 sides. But that is just me :)

No.

They are all polygons

1 triangle 1 pentagon and 2 trapezoids

Polygon Regular polygon Vertex Triangle Equilateral triangle Isosceles triangle Scalene triangle Acute triangle Obtuse triangle Right triangle Quadrilateral Rectangle Square Parallelogram Rhombus Trapezoid Pentagon Hexagon Heptagon Octagon Nonagon Decagon Circle Convex

Square,Triangle,Rectangle,Rhombus and Pentagon.

The main difference is that a triangle rectangle cannot exist.

these are 2D shapes:square,parallelogram,rhombus,hexagon,octagon,triangle,circle,pentagon and a rectangle