A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing

anonymous

  • one year ago

I need help with proving that the measures of the interior angles of a triangle is 180 degrees.

  • This Question is Closed
  1. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    draw a parallel line thru one of the vertexes, that is parallel to the other side ...

  2. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    |dw:1444082209218:dw|

  3. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I have gotten that far.

  4. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    what are angles called so that we can equate them like i did?

  5. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    and what is the measure in degrees of a straight line?

  6. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    alternate interior?

  7. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    180 degrees for a straight line.

  8. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    alt interior yes; that allows us to move a and c to the top

  9. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    now a+b+c = 180 by some straight line property

  10. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    What do you mean by straight line property?

  11. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    i mean, that i can never remember what they call these things .... the names should be better suited to you since you are fresh in the course.

  12. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    straight angle definition maybe?

  13. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    since a,b,c add create a straight line, then they add up to 18o degrees,

  14. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    but is that enough for this proof?

  15. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    should be what was it we were trying to prove?

  16. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    That the sum of the interior angles of a triangle are 180 degrees.

  17. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    we show that the three angles of a triangle form a straight line ... and thereby have a sum of 180

  18. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    thats proof enough for me

  19. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Thanks.

  20. amistre64
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 1

    good luck

  21. anonymous
    • one year ago
    Best Response
    You've already chosen the best response.
    Medals 0

    I need more help with this

  22. Not the answer you are looking for?
    Search for more explanations.

    • Attachments:

Ask your own question

Sign Up
Find more explanations on OpenStudy
Privacy Policy

Your question is ready. Sign up for free to start getting answers.

spraguer (Moderator)
5 → View Detailed Profile

is replying to Can someone tell me what button the professor is hitting...

23

  • Teamwork 19 Teammate
  • Problem Solving 19 Hero
  • You have blocked this person.
  • ✔ You're a fan Checking fan status...

Thanks for being so helpful in mathematics. If you are getting quality help, make sure you spread the word about OpenStudy.

This is the testimonial you wrote.
You haven't written a testimonial for Owlfred.