AIME15 Hardcore TMF user
Number of posts : 163 Age : 27 Location : Pleasanton, CA Registration date : 2008-08-13
| Subject: Simple Geometry Formulas: Wed Aug 13, 2008 3:46 pm | |
| Area of circle: pi*r^2, where r is the radius of the circle.
Area of square: s^2, where s is the side of the square.
Area of rectangle: l*w, where l and w are the two sides.
Area of parallelogram: b*h, where b is the base and h is the height.
Area of triangle: 1/2*bh, where b is the base and h is the height.
This should start you off. | |
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skittles School Math Nerd
Number of posts : 40 Age : 29 Location : Lost Registration date : 2008-08-13
| Subject: Re: Simple Geometry Formulas: Wed Aug 13, 2008 7:00 pm | |
| Volumes+a little bit past the basics
Volume of a cube: r^3 Volume of a rectangular prism: xyz Volume of a sphere: 4/3 pi r^3 Volume of a cylinder: pi r^2*h Volume of a cone: 1/3 pi r^2*h
Area of a rhombus: 1/2*x*y (x and y are the diagonals) Area of a ellipse: 1/2*a*b (a and b are the semi-axis) Area of a trapezoid: 1/2*h*(a+b) (a and b are the bases) | |
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Urc Starting Member
Number of posts : 13 Age : 28 Location : IN UR MOM Registration date : 2008-08-13
| Subject: Re: Simple Geometry Formulas: Wed Aug 13, 2008 7:28 pm | |
| An unrelated note but interesting
The derivative of the Volume of a sphere equals its surface area
f(x)=4/3 pir^3 f'(x)=4/3(3r^2)pi=4pir^2 | |
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skittles School Math Nerd
Number of posts : 40 Age : 29 Location : Lost Registration date : 2008-08-13
| Subject: Re: Simple Geometry Formulas: Thu Aug 14, 2008 7:25 am | |
| Surface Areas
SA of a cube: 6r^2 SA of a rectangular prism: 2xy+2yz+2xz SA of a sphere: 4pi r^2 SA of a cone: pi*r*l+pi r^2 SA of a cylinder: d*pi*h | |
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