What is a Parallelogram?

Sunday, June 28, 2020

What is a Parallelogram?

Properties of a Parallelogram

  • It is a 2D Plane shape 
  • Has Straight lines
  • It is a Quadrilateral so it has 4 sides and is a closed figure.
  • It has opposite sides are parallel.
  • The Opposite sides are congruent ( equal)
  • The opposite angles are congruent
  • The consecutive angles are supplementary or add to 180 degrees
  • The diagonals bisect one another 
  • The diagonals bisect angles creating opposite congruent triangles.

A trapezoid is not a parallelogram because by definition it only has one pair of parallel sides.
A circle is not a parallelogram because it has curved lines.
How about a triangle, nope it has three sides, not four.

A rectangle which is a parallelogram has two pairs of parallel sides and four congruent angles. A rhombus has four congruent sides but only the opposite angles are equal. If you combine the rectangle and the rhombus you get a square with four congruent sides and angles.
The Area is the base times the height:

Area = b × h
The height is at right angles to the base.

The Perimeter is the distance around the edges.
You can add all 4 sides or use.
2 times the (base + side length):

Perimeter = 2(b+s)


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