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anonymous

  • one year ago

Find the measure of Angle e?? need major help

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  1. anonymous
    • one year ago
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  2. welshfella
    • one year ago
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    First count the number of sides in the polygon How many?

  3. anonymous
    • one year ago
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    9

  4. anonymous
    • one year ago
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    9-2=7 7 times 180 right

  5. welshfella
    • one year ago
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    right now there a formula for finding the total number of angles in a polygon form its number of sides. if i recall correctly its 180(n - 2) i'll check that out.

  6. anonymous
    • one year ago
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    1,260 is the sum

  7. welshfella
    • one year ago
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    yes thats right so you now set up an equation

  8. anonymous
    • one year ago
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    what would it look like?

  9. welshfella
    • one year ago
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    6x - 1 + 7x + 6 etc = 1260 solve this for x and angle e = 7x + 9

  10. anonymous
    • one year ago
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    170 is the answer thanks!

  11. anonymous
    • one year ago
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    can i ask you another question??

  12. welshfella
    • one year ago
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    ok

  13. anonymous
    • one year ago
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    find the value of c. a. 10 b.5 c.square root 2 d. 10 square root 2

  14. anonymous
    • one year ago
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  15. welshfella
    • one year ago
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    this right angled triangle is also isosceles because the unmarked angle is also 45 degrees. So the other leg is also 5 sqrt2 you use the pythagoras theorem to solve this c^2 = (5 sqrt2)^2 + (5 sqrt2)^2

  16. welshfella
    • one year ago
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    (5 sqrt2)^2 = 5^2 * 2 = ?

  17. anonymous
    • one year ago
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    10??

  18. welshfella
    • one year ago
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    the final answer?

  19. anonymous
    • one year ago
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    c^2 = (5 sqrt2)^2 + (5 sqrt2)^2, does that equal 10?

  20. welshfella
    • one year ago
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    no (5 sqrt2)^2 = 5^2 * 2

  21. welshfella
    • one year ago
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    = 25 8 2 = 50

  22. welshfella
    • one year ago
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    * thats * not 8

  23. anonymous
    • one year ago
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    what do you do with the 50 now?

  24. welshfella
    • one year ago
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    c^2 = 50 + 50

  25. welshfella
    • one year ago
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    i've assumed you are familiar with the pythagoras theorem

  26. anonymous
    • one year ago
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    which is 100, and the final answer is c, so would it be 10?

  27. welshfella
    • one year ago
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    yep

  28. anonymous
    • one year ago
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    yes a^2 +b^2 = C^2

  29. anonymous
    • one year ago
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    i have another problem like this with a scalene triangle

  30. welshfella
    • one year ago
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    ok gtg now hope this has helped

  31. anonymous
    • one year ago
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    thank you

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