anonymous
  • anonymous
What is the measure of ∠TVU, and why? A.y, because Triangle RST is similar to triangle VUT B.y over 2, because Triangle RST is congruent to triangle VUT C.y + 55 degrees, because Triangle RST is similar to triangle TUV D.125 degrees − y, because Triangle RST is congruent to triangle TUV
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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schrodinger
  • schrodinger
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anonymous
  • anonymous
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anonymous
  • anonymous
@phi
phi
  • phi
do you know about "vertical angles" ?

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phi
  • phi
yes, no or maybe?
phi
  • phi
vertical angles are equal |dw:1433277907556:dw|
phi
  • phi
if you use that info with your picture |dw:1433277964853:dw|
phi
  • phi
the sum of the 3 angles in a triangle add up to ?
phi
  • phi
they add up to 180. if 2 angles in a triangle match 2 angles in another triangle, the 3rd angles must also match (because it's the number that makes the other two add up to 180)
anonymous
  • anonymous
do I add 55+55 cause a normal triangle should add up to 90
phi
  • phi
call the "vertical angle" x (some unknown number) in the left triangle you have 55+x+y = 180 (they have to add up to 180) in the right triangle you have 55+x + ? = 180 what must the ? be? it must be y
anonymous
  • anonymous
so its c right?
phi
  • phi
the point is if 2 angles are congruent, then the third angle is also. if 3 angles are congruent, the triangles are similar
anonymous
  • anonymous
ok ty for help
phi
  • phi
angle TVU is the unmarked angle in the bottom right triangle. the 2 triangles are similar and that means the 3 angles in one triangle are exactly equal to the corresponding angles in the other triangle. Follow ?

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