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ErikaaLynn

6. The sum of the measures of two exterior angles of a triangle is 264o. What is the measure of the third exterior angle? (3 points) 7. How many sides does a regular polygon have if each exterior angle measures 72o? (2 points)

  • one year ago
  • one year ago

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  1. hartnn
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    ok, do u know what how much does the angles in a triangle add up to ?

    • one year ago
  2. ErikaaLynn
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    sii yess lol

    • one year ago
  3. hartnn
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    sii ?

    • one year ago
  4. ErikaaLynn
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    sii is yes in spanish lol

    • one year ago
  5. hartnn
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    anyways, so, let the 3 angles be A,B,C so, A+B+C= .....? Exterior angles are 180-A, 180-B,180-C right ?

    • one year ago
  6. ErikaaLynn
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    yea

    • one year ago
  7. hartnn
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    so, its given as 180-A + 180-B = 264 can u find A+B from this ?

    • one year ago
  8. ErikaaLynn
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    um no

    • one year ago
  9. ErikaaLynn
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    is it 84?

    • one year ago
  10. hartnn
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    what A+B = 84 ? no.

    • one year ago
  11. ErikaaLynn
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    idk im not good at math

    • one year ago
  12. hartnn
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    180-A + 180-B = 264 here u get 360 -(A+B) = 264 now try to fin A+B

    • one year ago
  13. ErikaaLynn
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    96

    • one year ago
  14. hartnn
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    yes, A+B = 96 now from A+B+C = 180, can u find C ?

    • one year ago
  15. ErikaaLynn
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    um how do i do that

    • one year ago
  16. hartnn
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    96+C =180 C=... ?

    • one year ago
  17. ErikaaLynn
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    84

    • one year ago
  18. hartnn
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    yup, so the exterior angle will be 180-C = 180 -84 =... ?

    • one year ago
  19. ErikaaLynn
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    86

    • one year ago
  20. hartnn
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    86 or 96 ?

    • one year ago
  21. ErikaaLynn
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    96

    • one year ago
  22. ErikaaLynn
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    ?

    • one year ago
  23. hartnn
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    yes, its 96 thats the final answer for 1st.

    • one year ago
  24. ErikaaLynn
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    okay thanks :) and the other one ?

    • one year ago
  25. hartnn
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    ok, exterior angle = 72, interior angle = 180-72 =... ?

    • one year ago
  26. ErikaaLynn
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    108

    • one year ago
  27. hartnn
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    right . now use the formula to get number of sides (n) Interior angle = 180 * (n-2) /n

    • one year ago
  28. ErikaaLynn
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    okay u lost me lol

    • one year ago
  29. hartnn
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    108 *n = 180 *(n-2) 108n = 180n -360 can u find n from here ?

    • one year ago
  30. ErikaaLynn
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    um i dnt get it

    • one year ago
  31. hartnn
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    n = 360/72 = 5 sides.

    • one year ago
  32. ErikaaLynn
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    ohh so its 5

    • one year ago
  33. hartnn
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    yup.

    • one year ago
  34. hartnn
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    just the use of a formula...

    • one year ago
  35. ErikaaLynn
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    ohh thank you so much

    • one year ago
  36. hartnn
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    welcome ^_^

    • one year ago
  37. Mcwoodman
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    Not trying to be rude but yes in Spanish is Cie.

    • 4 months ago
  38. Nutcase482
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    No, it's si

    • 4 months ago
  39. Mcwoodman
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    My Spanish teacher taught me wrong!

    • 4 months ago
  40. iambatman
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    profiled.

    • 3 months ago
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