Coming Monday 15, 2014!!

General Quadrilaterals

Each Quadrilateral must have:

  • four sides
  • straight lines
  • 2 dimensional

There are two kinds of Quadrilaterals:

Regular and Irregular

Regular: All sides and angles are congruent (Square, Rhombus)

Irregular: All sides and angles are not the same (Trapezoid, Kite, Parallelogram, etc)


Include Squares, Rhombi, and Rectangles.

They have at least one set of opposite

  • parallel sides
  • supplementary angles


All angles must be 90 degrees.

All angles must be the same size.


All sides are an equal length. Diagonals bisect each other.


A rectangle is a four-sided shape where every angle is a right angle (90°). Also opposite sides are parallel and of equal length.


A trapezoid is a quadrilateral with one set of parallel sides. A trapezoid is isosceles when it has one set of congruent sides and the base angles are congruent.


The Diagonals intersect and 90 degrees. The longest diagonal is the angle bisector.