anonymous
  • anonymous
Geometry
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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katieb
  • katieb
I got my questions answered at brainly.com in under 10 minutes. Go to brainly.com now for free help!
anonymous
  • anonymous
|dw:1371219474841:dw| perimeter of triangle ABC?
anonymous
  • anonymous
LC = 11, AB = 7
phi
  • phi
is there any more info about the triangle ?

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anonymous
  • anonymous
nope
phi
  • phi
can you post a screen copy of the question ?
anonymous
  • anonymous
wait, I will just write down the problem
amistre64
  • amistre64
|dw:1371220690085:dw|
anonymous
  • anonymous
Given a triangle ABC. AB = 7. A circle is constructed inside ABC so that the circle intersects AB at K, AC at L and BC at M. If LC = 11, find the perimeter of ABC
phi
  • phi
amistre posted how to do it
anonymous
  • anonymous
i don't understand, why AK is also x?
anonymous
  • anonymous
I mean, why AK = AL?
amistre64
  • amistre64
tangents create isosolese "triangles"
phi
  • phi
when you have 2 tangents from the same point to a circle they are equal |dw:1371221012871:dw|
amistre64
  • amistre64
|dw:1371221026539:dw|
phi
  • phi
we can use congruent triangles to prove this
amistre64
  • amistre64
ugh, SSA that is
anonymous
  • anonymous
ah I get it now
amistre64
  • amistre64
so regardless of x or y, x+y has to equal 7 ... and each "other" leg is x or y
anonymous
  • anonymous
thanks a lot guys :)
amistre64
  • amistre64
youre welcome

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