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Setsuna-Yuregeshi

  • one year ago

What is a similarity statement and how do I write one? I learned about them in geometry the other day, but i still don't understand them.....

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  1. phi
    • one year ago
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    a good example of "similar" in geometry is a square. two squares of different sizes are similar (they have the same shape, and their sides form identical angles)

  2. phi
    • one year ago
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    if two shapes are similar, then if you change the size you can make them look identical.

  3. anonymous
    • one year ago
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    hes right

  4. Setsuna-Yuregeshi
    • one year ago
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    OOH, I see.. What's a similarity statement? How do you write one?

  5. anonymous
    • one year ago
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    stating something like they have the same angles

  6. phi
    • one year ago
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    similar is useful when you have triangles. Here is an example: |dw:1436992086041:dw|

  7. phi
    • one year ago
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    the two triangles have the same shape, but different sizes. but say you know the height of the person, and measure his shadow then you measure the length of the tree's shadow. because the triangles are similar , we can figure out how high the tree is!

  8. anonymous
    • one year ago
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    @phi how do you bring up your engagement stat

  9. anonymous
    • one year ago
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    same question for teamwork

  10. phi
    • one year ago
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    the "similarity statement" could be written: person's height: his shadow :: tree's height: tree shadow or using fractions \[ \frac{person\ height}{his \ shadow} = \frac{tree\ height}{its \ shadow} \]

  11. phi
    • one year ago
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    though in geometry, we usually use letters to name the sides of a triangle.

  12. phi
    • one year ago
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    Does this sound like what you were being taught?

  13. Setsuna-Yuregeshi
    • one year ago
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    Yeah, it's just I didn't get it then.....

  14. Setsuna-Yuregeshi
    • one year ago
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    Sorry, but @phi, what is a similarity statement?

  15. phi
    • one year ago
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    a similarity statement tells you which sides "go with" which side. for example, suppose we have these two triangles |dw:1436992841773:dw|

  16. phi
    • one year ago
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    the angle at A "matches" the angle at Y B with Z C with X we could write ABC is similar to YZX (in fact people would usually label the 2nd triangle so it reads XYZ, to make it clearer)

  17. phi
    • one year ago
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    I think they use ~ instead of = so you would write ABC ~ YZX and that is short to say: angle A matches angle Y angle B matches angle Z angle C matches angle X it also says: side AB is similar to side YZ (the side from angle A to angle B) matches the side from Y to Z and side BC ~ side ZX

  18. phi
    • one year ago
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    Does that sound familiar?

  19. Setsuna-Yuregeshi
    • one year ago
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    Sorry, I havee to go, but I will come back later.

  20. Setsuna-Yuregeshi
    • one year ago
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    @phi, Thank you. On my homework though sometimes I didn't see them corresponding in the choices. Like how you had ABC similar to YZX..... Or maybe I just didn't see it right...

  21. phi
    • one year ago
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    Post a specific question and choices, and maybe we can make sense of it.

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