anonymous
  • anonymous
Find the value of x. The diagram is not to scale
Mathematics
  • Stacey Warren - Expert brainly.com
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SOLVED
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chestercat
  • chestercat
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anonymous
  • anonymous
ajprincess
  • ajprincess
|dw:1353828858730:dw| Since AB=AC triangle ABC is an isosceles triangle. So y=5x-40 y and 5x are supplementary angles y+5x=180 5x-40+5x=180 10x-40=180 Can u find x @Kagome_gurl8?
anonymous
  • anonymous
being an isosceles triangle, 5x-40 + 5x = 180 , Solve it for x now :)

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anonymous
  • anonymous
well the base angles of an isosceles triangle are equal, so since that angle in the bottom left of the triangle is 5x - 40, then so is the angle on the bottom right... and the angle on the bottom right and the angle just outside the triangle are what we call a linear pair, and a linear pair are two angles that add up to 180 degrees, and just as shown above, you add those two angles together to get 180 and solve for x.
anonymous
  • anonymous
I got x=22, is that correct?
anonymous
  • anonymous
no... what were your steps?
anonymous
  • anonymous
yes you are right , sorry
anonymous
  • anonymous
Yep, you are correct !
anonymous
  • anonymous
Thank you all very much.....

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