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AREA FORMULAS

square = a 2 external image square.gif

rectangle = ab external image rect.gif

parallelogram = bh external image parral.gif

trapezoid = h/2 (b1 + b2) external image trap.gif

circle = pi r 2 external image circle.gif

ellipse = pi r1 r2 external image ellipse.gif


Examples

Square: The area formula of a square is area= a^2.
Both side lenghts of the square is 9.
To find the area you go (area=9^2) or (area=9 sqared).
Therefore the area of a square is 81 square units.

Rectangle: The area formula of a rectangle is area = lw, (length times the width)
If your length is 5 and width is 6
To find the area you go (area=5*6)
Therefore the area is 30 square units.

Parallelogram: The area formula for parallelogram is area= bh, (base times the height).
If your base is 9 and the height is 5.
To find the area you go area=(9*5).
Therefore the area is 45 sqaure units.

Trapezoid: The area formula for a trapezoid is area= (b1+b2)/2*h, ( base1+base2 divided by 2 times the height).
If base1 is 10 and base 2 is 5 and the height is 9.
To find the area you go area=(10+5/2*9).
Therefore the area is 67.5 square units.

Circle: The area formula for a circle is area=(pi)r^2), (pie)(r squared)
If the radius of the circle is 12.
To find the area you go area=(pi)(12^2).
Therefore the area of a circle is 452.16 square units.

Ellipse The area formula for a circle is (pi)(r1*r2), (pie)(times radius1 times radius2)
If radius1 is 5 and radius2 is 10.
To find the area you go area=(pi)(5*10).
Therefore the area of an ellipse is 157 square units



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Normally distrbuted data problems Normally distrbuted data problems ryalford ryalford Jun 19, 2007
November 24 November 24 guest (216.73.64.81) guest (216.73.64.81) Dec 1, 2006
GIF Image
nstan2.GIF 4 KB njstanick njstanick May 15, 2007
GIF Image
nstanick.GIF 1 KB njstanick njstanick May 18, 2007
number of possible arrangments given set number of possible arrangments given set The_Big_J The_Big_J Jun 18, 2007
GIF Image
Number_line.GIF 5 KB captainkolan captainkolan May 4, 2007
GIF Image
numbline.gif 1 KB njstanick njstanick May 18, 2007
Objective 1 S3 Objective 1 S3 captainkolan captainkolan May 4, 2007
Objective 11 S3 Objective 11 S3 dubyk dubyk May 9, 2007
Objective 14 Objective 14 RissaK RissaK May 7, 2007
objective 15 objective 15 rwj rwj May 18, 2007
Objective 17 - Other permutations, circular and repetitive elements Objective 17 - Other permutations, circular and repetitive elements bendo bendo Apr 30, 2007
Objective 17 - The Line of Best Fit Objective 17 - The Line of Best Fit khugill khugill May 3, 2007
Objective 18 Objective 18 Tody Tody May 18, 2007
objective 19 objective 19 akob akob Apr 25, 2007
objective 2 classifying real numbers objective 2 classifying real numbers njstanick njstanick May 1, 2007
Objective 25-Grade 10 Applied Math Objective 25-Grade 10 Applied Math Grahammer Grahammer May 1, 2007
objective 28 S3 objective 28 S3 junior_28 junior_28 May 7, 2007
Objective 28- Graph Line By Slope & Intercept Objective 28- Graph Line By Slope & Intercept Skidd Skidd Apr 23, 2007
Objective 5 Graph of Network Objective 5 Graph of Network aaron7 aaron7 May 7, 2007
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