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 Amsco Integrated Algebra I: Quadrilaterals
This is a free lesson from our course in Amsco's Integrated Algebra
 
   
This lesson is designed to introduce you to quadrilaterals; followed by taking forward from the facts learned earlier about polygons having more than three sides, to explain about types of quadrilaterals and properties of polygons such as: trapezoid, parallelogram, rectangle, rhombus, square, etc. It also covers the basics of polygons and angles and their relationship. E.g. in summary, the sum of the measures of the interior angles of an n-sided polygon is 180(n - 2). A quadrilateral is a polygon with four sides. A point at which any two sides of the quadrilateral meet is the vertex of the quadrilateral. At each vertex, the two sides that meet form an angle of quadrilateral. (More text below video...)
<h2> Quadrilaterals</h2> <p> quadrilateral,trapezoid,types of quadrilaterals,parallelogram,parallelograms,square,rectangle,rhombus,math,geometry,math help</p> <p> explains about quadrilaterals and types of quadrilaterals such as trapezoid, parallelogram, rectangle, rhombus, square, etc.</p>
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(Continued from above) A quadrilateral is a polygon with four sides. A point at which any two sides of the quadrilateral meet is the vertex of the quadrilateral. At each vertex, the two sides that meet form an angle of quadrilateral. In a quadrilateral, two angles whose vertices are the endpoints of a side are called consecutive angles and two angles that are not consecutive angles are called opposite angles.

When we vary the shape of the quadrilateral by making some of its sides parallel, by making some of its sides equal in length, or by making its angles right angles, you’ll find special quadrilaterals, as shown below:
Remember:
• A trapezoid is a quadrilateral in which two, only two sides are parallel.
• A parallelogram is a quadrilateral in which both pairs of opposite sides are parallel.
• A rectangle is a parallelogram in which all four angles are right angles
• A rhombus is a parallelogram in which all sides are of equal length.
• A square is a rectangle in which all sides are of equal length. It is also correct to say that a square is a rhombus in which all angles are right angles.
The video above explains in detail with the help of several examples of quadrilaterals and including about the family of parallelograms and their relationship.
 
   

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