anonymous
  • anonymous
Find the angles in a triangle if the measures of the angles are a.) x, 2x, and 3x b.) x-10,x, and x+10 I'm in grade nine. Exam on monday! I have no idea what this question is talking about, oh yea, is there a way to change my username? I made it a year ago and I want to change it to TrueDirectioner or VasHappening?
Mathematics
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SOLVED
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katieb
  • katieb
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anonymous
  • anonymous
Thanks Mertsj!
Mertsj
  • Mertsj
Do you know that when you add the three angles of a triangle you always get 180?
anonymous
  • anonymous
yup. I'm not that dumb lol

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Mertsj
  • Mertsj
So they said the three angles of the triangle are x, 2x and 3x. So you should write and solve the equation that says the sum of those 3 is 180
anonymous
  • anonymous
x+2x+3x=180 6x=180 *180 divided by 6* x= 30
anonymous
  • anonymous
thanks!
Mertsj
  • Mertsj
Yes. x = 30 and 2x = ? and 3x= ?
anonymous
  • anonymous
wait is that right?
anonymous
  • anonymous
2x=60
anonymous
  • anonymous
3x=90
Mertsj
  • Mertsj
Do those 3 add up to 180?
anonymous
  • anonymous
30 +60+90 = 180!
Mertsj
  • Mertsj
So now you have found the 3 angles of that triangle. And the b example is similar.
Mertsj
  • Mertsj
I'm not in a grade.

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