Quadrilaterals!

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)

Parallelogram

Include Squares, Rhombi, and Rectangles.

They have at least one set of opposite

  • parallel sides
  • supplementary angles

Sqaure

All angles must be 90 degrees.

All angles must be the same size.

Rhombus

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

Rectangle

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


Trapezoid

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.

Kites

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