need a formula for this triangle

R

regal

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Jun 27, 2007
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Ok this is not homework. I need to make a part on my car and I need to know how long to make it! Any help would be much appreciated.

triangle.jpg


b = 57mm please give me a formula or help me work out "a"!!!

thanks
 
You need more information. Such as, the central angle.

If you know the angle you could use \(\displaystyle \L\\57=2a\cdot{sin{\frac{x}{2}}}\), then solve for a.

Where x is the angle.
 
Do you know the radius or diameter of the circle? a = the radius. Otherwise, you need more information so get a, like galactus has said.
 
regal said:
Ok this is not homework. I need to make a part on my car....
Click to expand...
It should be noted that, as a math-tutoring forum (not a body shop), the help here might be correct in an "ideal" mathematical context, but be unhelpful, possibly harmful, as relates to your car. You might want to break down and hire a guy who knows what he's doing...? :shock:

Eliz.
 
Probably decorating your hub caps :idea:

As others have stated: we need ONE additional info, like size of circle...
 
obviously the part i need to make is "a" - It's a lever to go on an automatic transmission so I can use an aftermarket shifter. Not something that will make my car unsafe or whatever.

The circle is imaginary so I dont know the radius, heres another picture:

gb.jpg


In this picture you can see the transmission and the lever is drawn in red twice. Once fully fowards and once all the way back. The blue line is "b"

Where is the central angle?

Thanks for all you replys so far!!
 
How big is the lever - or is that what you are trying to calculate?

See - if you don't have any constraint on the angle - you can make as big or as small alever you please.
 
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