A community for students.
Here's the question you clicked on:
← 55 members online
 0 viewing
jakob
 3 years ago
if two lines intersect, then the vertical angles are congruent. How do you prove that?
jakob
 3 years ago
if two lines intersect, then the vertical angles are congruent. How do you prove that?

This Question is Closed

ilovenyc
 3 years ago
Best ResponseYou've already chosen the best response.1Proof: 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.
Ask your own question
Sign UpFind more explanations on OpenStudy
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
 Engagement 19 Mad Hatter
 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.