Making rear bumper design. Help me out with the math

Its SketchUp by google. And I just used screenshot and added the numbers in using Paint. I never thought I would be the computer type

 

If you actually used true dimensions while creating it, you can use the dimension tool to display all the dimensions for you. (Tools/Dimensions)

Also, when making a line/box/whatever that you know the measurement, you can just type that in after starting the object. (click where it starts, then type in the size (6"). For 2d objects, type it in with a comma (6",3") and hit enter)

 

Thanks Man!

 

There's also a hilux you can import that is pretty true to dimensions so you can see what the bumper will look like. Its not perfect, but its close enough to get an idea. Just have to delete the existing bumper first.

http://sketchup.google.com/3dwarehouse/details?mid=711d48dedf05152d188465d34b410a3e&prevstart=60

 

Nice work! Sketch up makes everyone look like a pro at CAD...