Transcript Quadrilaterals - FurNation

Quadrilaterals
By Billy Hudson
4/14/05
Geometry 4th period
What is a Quadrilateral?
A Quadrilateral is a shape that has 4
sides, 4 vertices, and 2 diagonals.
Different Types of Quadrilateral.
There are many different
types of quadrilaterals, but
most common are the
Parallelogram, rectangle,
square, trapezoid, and the
rhombus.
Parallelograms
A parallelogram is a 4-sided shape formed
by two pairs of parallel lines. It has equal
sides and have the same length and equal
measure. To find the area of a
parallelogram, multiply the base by the
height.
Ex. A=b x h
Rectangles
Rectangles are shapes that have 4sides, but the length and height are
not equal.
Trapezoids
The trapezoid is a quadrilateral with one pair of
parallel sides. The area of the trapezoid is equal to
the average of the bases times the height. So, you
add the two bases, divide by 2, and then multiply
by the height.
area = ((b1 + b2) / 2)h
Square
A square is a closed 4-sided plane
with four equal sides.
Rhombus
A rhombus is a quadrilateral with
both pair of parallel sides equal in
length. It is also called a equilateral
parallelogram.
This concludes my presentation and if
you have any questions, ask me or if I
don’t know, ask Ms. Burley.