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anonymous

  • one year ago

Δ ABC is isosceles. Angles B and C are congruent. The m∠A = 40°, m∠B = (3x + 1)°. Find x.

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  1. anonymous
    • one year ago
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    you know, when it a isosceles triangle, which makes 2 angles equal to the third, right?

  2. anonymous
    • one year ago
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    Yeah?

  3. anonymous
    • one year ago
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    so you got this right? m<A=m<B right? so from here you can solve it :) it just gonna give you super ugly number though :)

  4. anonymous
    • one year ago
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    Are you sure? The answers are A) 13 B) 23 C) 46.3 D) 70 They aren't ugly?

  5. anonymous
    • one year ago
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    well,

  6. anonymous
    • one year ago
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    if there were your answers then you should do this: m<A + m<B = 180 ( we don't need C since B = C) 40 + 3x +1 =180 41 +3x =180 3x= 139 x =46.3 :)

  7. anonymous
    • one year ago
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    Thank you! :D

  8. anonymous
    • one year ago
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    cuz if you use m<A = m<B is gonna give you 13. something ( very ugly)

  9. anonymous
    • one year ago
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    |dw:1441859686450:dw|

  10. anonymous
    • one year ago
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    Then to find \(x\), we know that a triangle has 180 degrees. So, \(<A+<B+ <C= 180\)

  11. anonymous
    • one year ago
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    oh shoot,

  12. anonymous
    • one year ago
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    is 23

  13. anonymous
    • one year ago
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    thank god i didnt submit XD

  14. anonymous
    • one year ago
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    WRONG ANSWER~~~ you still need C since you gonna = 180 cuz it 3 angles is sum of a triangle

  15. anonymous
    • one year ago
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    im so confused D:

  16. anonymous
    • one year ago
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    |dw:1441859857221:dw|

  17. anonymous
    • one year ago
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    so like you just : m<A + m<B + m<C =180 you got the second line so I skip~~ 6x +42 =180 6x = 138 x = 23 lol~~~

  18. anonymous
    • one year ago
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    Okeyyy :D thanksss

  19. anonymous
    • one year ago
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    @jgarrett Tell me what's confusing, and I might help you. :D

  20. anonymous
    • one year ago
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    \(\color{#0cbb34}{\text{Originally Posted by}}\) @Leong WRONG ANSWER~~~ you still need C since you gonna = 180 cuz it 3 angles is sum of a triangle \(\color{#0cbb34}{\text{End of Quote}}\) Exactly what I said.

  21. anonymous
    • one year ago
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    Math you like wrote it out perfectly :D thanks dude

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