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anonymous

  • 5 years ago

A convex decagon has six side equal angles .Two angles are 20 degree more than one of six angles.Two more triangle are 40 degrees more than one of the six angles.Find the measure of each angle.

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  1. anonymous
    • 5 years ago
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    total of angles in a decagon = 1440 6x + 2(x+20) + 2(x+40) = 1440 6x + 2x + 2x + 40 + 80 = 1440 10x = = 1320 x =132 2x angles = 264 4xangles = 528

  2. anonymous
    • 5 years ago
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    i assumed you were talking about interior angles

  3. anonymous
    • 5 years ago
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    I'm an idiot Six equal angles of 132 Two equal angles of 152 Two equal angles of 172 ?

  4. anonymous
    • 5 years ago
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    oh yes i worked out other angles incorrectly Elixa has correct solution

  5. anonymous
    • 5 years ago
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    But jimmy's calculations are right if you want working out sorry thanks

  6. anonymous
    • 5 years ago
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    thank Eli and Jimm

  7. anonymous
    • 5 years ago
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    why i doubled and X by 4 I dont know - lol!!

  8. anonymous
    • 5 years ago
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    yw

  9. anonymous
    • 5 years ago
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    Two angles are 20 degree more than one of six angles or each 20 more?

  10. anonymous
    • 5 years ago
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    I think the sum of 2 angle is 20 more not each angle 20 more?

  11. anonymous
    • 5 years ago
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    I take it to mean each of two angles is 20 more than one of the six equall angles

  12. anonymous
    • 5 years ago
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    I was confused when i was working out the value of the two equal angles - i wrote down 2x instead of x + 20

  13. anonymous
    • 5 years ago
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    6x + (x+20) + (x+40) = 1440 right?

  14. anonymous
    • 5 years ago
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    Yes

  15. anonymous
    • 5 years ago
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    ok, thank

  16. anonymous
    • 5 years ago
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    six side equal angles, 2 angles (x+20) ,and 2 angles (x+40) ?

  17. anonymous
    • 5 years ago
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    yes

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