Monday, November 8, 2010

60-Second Good-To-Knows: 11/8/2010

This week’s topic: Geometry

Area:

Area of a square: s^2
s: length of one side

Area of a rectangle: l × w
l: length
w: width

Area of a triangle: (b × h)/2
b: length of base
h: length of height

Area of a trapezoid: h (b1 + b2) /2
b1 and b2: length of bases
h: length of height

Area of a circle: (pi)r^2
r=radius

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