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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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JPEG Image function_1.JPG 125 KB hilary__22 hilary__22 May 7, 2007
JPEG Image function_2.JPG 119 KB hilary__22 hilary__22 May 7, 2007
GIF Image
G3.GIF 12 KB Moshenko Moshenko May 7, 2007
GIF Image
gears_1.gif 4 KB biggmaxx biggmaxx Apr 19, 2007
JPEG Image gggg.JPG 40 KB Dave15 Dave15 May 2, 2007
Grade 10 Applied Objecive 38; Pythagorean Theorem. Grade 10 Applied Objecive 38; Pythagorean Theorem. AB77 AB77 May 17, 2007
Grade 10 Applied Objective 16 Grade 10 Applied Objective 16 Moshenko Moshenko May 9, 2007
Grade 10 Applied objective 28 Grade 10 Applied objective 28 WR909 WR909 May 15, 2007
Grade 10 applied objective 5 Grade 10 applied objective 5 Emo_Nemo Emo_Nemo May 11, 2007
Grade 10 Obj.22 Equation of Line in Slope & y-intercept form Grade 10 Obj.22 Equation of Line in Slope & y-intercept form biggmaxx biggmaxx May 18, 2007
Grade 11 applied objective 12 Grade 11 applied objective 12 Dave15 Dave15 May 2, 2007
Grade 11 Applied Objective 13 Grade 11 Applied Objective 13 Brittany13 Brittany13 May 7, 2007
Grade 11 Applied Objective 20 Grade 11 Applied Objective 20 ponty ponty May 7, 2007
Grade 11 Applied Objective 30 Grade 11 Applied Objective 30 goober goober May 7, 2007
Grade 11 Applied Objective 5 Grade 11 Applied Objective 5 tsuth11 tsuth11 May 4, 2007
grade 11 block 3 obj. 3 grade 11 block 3 obj. 3 agmaga agmaga May 6, 2007
Grade 11 block 3 objective 16 Grade 11 block 3 objective 16 bdelaur bdelaur May 7, 2007
grade 11 block 3 objective 21 grade 11 block 3 objective 21 jbomb1 jbomb1 May 6, 2007
Grade 11 Block 3 Objective 4 Grade 11 Block 3 Objective 4 hilary__22 hilary__22 May 7, 2007
Grade 11 Objective 17 Grade 11 Objective 17 andymck andymck May 7, 2007
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