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sammy12 Group Title

If the measures of three angles in a triangle are (2x+15)º, (10x – 20)º, and (3x + 2)º, then find the value of 15x – 3. I am getting 180. Is it right ?

  • 2 years ago
  • 2 years ago

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  1. saifoo.khan Group Title
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    The sum of all the internal angles of a triangle = 180*

    • 2 years ago
  2. sammy12 Group Title
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    (2x+10)+10x-20)+(3x+2)=180 15x-3=180 15x=183 x=183/15=12.2 x=12.2 (15x-3)=15(12.2)-3=180

    • 2 years ago
  3. sammy12 Group Title
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    Is it right

    • 2 years ago
  4. saifoo.khan Group Title
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    I guess you did a mistake? 2x+15

    • 2 years ago
  5. sammy12 Group Title
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    Please can you check it

    • 2 years ago
  6. saifoo.khan Group Title
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    it's 2x+15!

    • 2 years ago
  7. math>philosophy Group Title
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    I got 15x -3 = 180

    • 2 years ago
  8. sammy12 Group Title
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    I wrote wrong here. but I put the correct numbers

    • 2 years ago
  9. sammy12 Group Title
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    yes I got the same

    • 2 years ago
  10. math>philosophy Group Title
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    2x + 15 + 10x – 20 + 3x + 2 = 180

    • 2 years ago
  11. saifoo.khan Group Title
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    x = 12.2 is right!

    • 2 years ago
  12. sammy12 Group Title
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    My textbook saying 90 as a answer

    • 2 years ago
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