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#1
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Calculate Angle and Length in Triangle
I have a Spreadhset with the following representing two sides of a Triangle
Angle Length Side1, 20 35 Side2, 45 30 Side3, I need a formula to calculate the Angle (degrees) and Length for the third Angle TIA C |
#2
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Calculate Angle and Length in Triangle
angle3 = 180 - ( angle1 + angle2 )
side3 is a bit trickier, must be a formula out there somewhere on the net though. Will have a think about that... "Cathy" wrote: I have a Spreadhset with the following representing two sides of a Triangle Angle Length Side1, 20 35 Side2, 45 30 Side3, I need a formula to calculate the Angle (degrees) and Length for the third Angle TIA C |
#3
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Calculate Angle and Length in Triangle
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#4
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Calculate Angle and Length in Triangle
Some more info:
Law of Cosines: http://en.wikipedia.org/wiki/Law_of_cosines Law of Sines: http://en.wikipedia.org/wiki/Law_of_sines and maybe Law of Tangents: http://en.wikipedia.org/wiki/Law_of_tangents merjet wrote: See he http://www.ajdesigner.com/phptriangl...ion_side_a.php Hth, Merjet -- Dave Peterson |
#5
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Calculate Angle and Length in Triangle
Your data doesn't describe a triangle.
Angle Length Side1 20 35 Side2 45 30 Side3 If you had: Angle Length Side1 20 35 Side2 30 Side3 Then the triangle would be: Angle Length Side1 20 35 Side2 17 30 Side3 143 61.65 ====== If you had: Angle Length Side1 20 35 Side2 45 Side3 Then the triangle would be: Angle Length Side1 20 35 Side2 45 72.36 Side3 115 92.75 Sometimes, too much information isn't a good thing! Cathy wrote: I have a Spreadhset with the following representing two sides of a Triangle Angle Length Side1, 20 35 Side2, 45 30 Side3, I need a formula to calculate the Angle (degrees) and Length for the third Angle TIA C -- Dave Peterson |
#6
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Calculate Angle and Length in Triangle
And sometimes too little information....
The angle provided is not the angle of a corner. It is the angle of the line (or direction the line is pointing in with 0 degrees being at horizontally pointing up, 90 degrees pointing vertically to the right etc.) Regards C |
#7
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Calculate Angle and Length in Triangle
"Dave Peterson" wrote in message Your data doesn't describe a triangle. If you had: Angle Length Side1 20 35 Side2 30 Side3 Then the triangle would be: Angle Length Side1 20 35 Side2 17 30 Side3 143 61.65 That would contain the formula I would need, as I can calculate Angle by deducting Angle1 from Angle2 Would be much obliged if you could share the formula used to calculate the blanks in this example you showed. |
#8
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Calculate Angle and Length in Triangle
Hi Cathy,
If this is a follow up to the post l helped you with earlier in the week then you need to change these 2 lines: TiltValue = Range("A1").Value / 6 Theta = (TiltValue / 60 ) * TwoPI to: TiltValue = Range("A1").Value Theta = (TiltValue * (PI/180)) or: TiltValue = Range("A1").Value / 6 Theta = Radians(TiltValue) If you look up COS and RADIANS in Excel help you will get explanations & examples. It saved me having to get out all those geometry books! Regards Michael |
#9
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Calculate Angle and Length in Triangle
Thanks again for that Michael
It is not quite a follow on from the previous mail but forms part of the same spreadsheet. The previous mail was to enable a visual illustration of what was happening. I did get your correction on changing the lines to show degrees and this works a treat. I thank you dearly for this. This part merely wants to calculate the values using formulaand display the values in cell. I will have to look at this over the weekend as I have to get out now before the weather turns. Have a nice day C "michael.beckinsale" wrote in message ... TiltValue = Range("A1").Value / 6 Theta = (TiltValue / 60 ) * TwoPI to: TiltValue = Range("A1").Value Theta = (TiltValue * (PI/180)) or: TiltValue = Range("A1").Value / 6 Theta = Radians(TiltValue) If you look up COS and RADIANS in Excel help you will get explanations & examples. It saved me having to get out all those geometry books! |
#10
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Calculate Angle and Length in Triangle
I have done a spreadsheet to calculate if have you have 2 lengths and one
degree also to work out degrees of a triangle if you have the 3 lengths ALLAN I have a spreadhset with the following representing two sides of a Triangle Angle Length Side1, 20 35 Side2, 45 30 Side3, I need a formula to calculate the Angle (degrees) and Length for the third Angle TIA C |
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