anonymous
  • anonymous
HELP !!! In a triangle, the second angle is twice the measure of the first, and the third angle is three times the measure of the second. Find the measure of the third angle . A. 20 B. 30 C. 120 D. 180 It is NOT B.
Mathematics
jamiebookeater
  • jamiebookeater
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alekos
  • alekos
well we know that the sum of the three angles of a triangle add up to 180 degrees right?
anonymous
  • anonymous
Yes
anonymous
  • anonymous
If you work in terms of the first angle, there is 9 x the first angle. There is 180 degrees in a triangle. 180/9=20 degrees. 1st angle = 20 degrees 2nd angle = 2x20=40 degrees 3rd angle = 3x40=120 degrees. added together, you get 180 degress

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alekos
  • alekos
now if we call the first angle x what would this mean?
alekos
  • alekos
not a good idea to just give it away

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