Similar triangles. How does 4/6 turn into 2h/3 ?

  • Thread starter nukeman
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  • #1
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Homework Statement



r/h = 4/6

This turns into: r = 2h/3

How, can someone please refresh me? I am doing a related rates problem, and I for this! :(


Homework Equations





The Attempt at a Solution

 

Answers and Replies

  • #2
dextercioby
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Isn't 4/6 = 2/3 ? (Everything is written in basis 10).
 
  • #3
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Homework Statement



r/h = 4/6

This turns into: r = 2h/3

How, can someone please refresh me? I am doing a related rates problem, and I for this! :(


Homework Equations





The Attempt at a Solution

r/h = 4/6 = 2/3

Now multiply both sides of this equation by h.
 
  • #4
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4/6 * x = 2x/3x ?

Why is just 2x/3 ?
 
  • #5
dextercioby
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The multiplication affects only the numerator. Think about it as (6/4)x5 = (6:4)x 5 = 6:4x5 = 6x5:4 = 30:4 = 7.5
 
Last edited:
  • #6
HallsofIvy
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If you are doing things involving "related rates" and Calculus, I think we have right to assume that you can do arithmetic! 4/6= (2*2)/(2*3)= 2/3!!!
 
  • #7
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If you are doing things involving "related rates" and Calculus, I think we have right to assume that you can do arithmetic! 4/6= (2*2)/(2*3)= 2/3!!!
And if this assumption by us is incorrect, then you are going to have a very difficult time in calculus.
 

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