A community for students.

Here's the question you clicked on:

55 members online
  • 0 replying
  • 0 viewing


  • 4 years ago

if two lines intersect, then the vertical angles are congruent. How do you prove that?

  • This Question is Closed
  1. anonymous
    • 4 years ago
    Best Response
    You've already chosen the best response.
    Medals 0

    Proof: Let line AB intersect line CD at point O. Angle AOC + Angle COB = 180, because AB is a straight line and therefore equal to 180. By the same reasoning, Angle COB + Angle BOD = 180. Since both sums are equal to 180, then Angle AOC + Angle COB = Angle COB + Angle BOD. Now subtract Angle COB from both sides: Angle AOC = Angle BOD.

  2. 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...


  • 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.