Posted by Anonymous on Saturday, October 17, 2009 at 11:26am.
How do you find a missing length in a triangle? I have two triangles. The lengths given are 18:27:x and the other one is 14:21:28.

Math  jim, Saturday, October 17, 2009 at 2:05pm
I don't understand the question. You have only one missing length for two triangles?
I do note that the ratio of sides in the two cases is
2:3:(1/3)x
2:3:4
Just considering triangle 1, x could be anything less than 45 (bonus question: why?).
Maybe you want x so that the two triangles will be the same shape  same angles. If so, I think I've given you a big clue by writing the ratios of sides.

Math  Anonymous, Saturday, October 17, 2009 at 2:40pm
Perfect. I figured out what x was but I couldn't figure out how to show the calculations! The answer is 36, I think? Do you get the same thing?

Math  jim, Saturday, October 17, 2009 at 2:45pm
Yes, absolutely!
Try this:
18 : 27 : x = 2*9 : 3*9 : x
14 : 21 : 28 = 2*7 : 3*7 : 4*7
Clearer now?

Math  Anonymous, Saturday, October 17, 2009 at 2:47pm
Yes, perfectly. Thank you. Sorry I wasn't clearer on my question asking
Answer This Question
Related Questions
 MathTriangles  How do I find a missing length to a triangle? The lenths I have...
 Geoemtry  I am given two triangles One triangle has side length of 4 and 2x+7 ...
 math  if two triangles are similar, what can you say about the ratios of the ...
 math  if two triangles are similar, what can you say about the ratios of the ...
 math  If two triangles are similar, what can you say about the ratios of the ...
 Math  If two triangles are similar,what can you say about the ratios of the two...
 geometry  The perimeter of an isosceles triangle is 37 in. The lengths of the ...
 Math  Find the exact value of the trigonometric function given that sin u = 5/...
 Math  Find the exact value of the trigonometric function given that sin u = 5/...
 math  Which of the following statements is always true of similar polygons? (1 ...
More Related Questions