Proof: The Exterior Angles Theorem

This video provides a two column proof of the exterior angles theorem

[jennifersolano]

Thank you, you made my homework easier to understand

[wynsik]

Man, thank you so much. My math teacher doesn’t explain stuff super well, and this made my life way easier.

[saronghezai]

Thank you for explaning and giving your time. It is been wonderfull and life saving using your videos. :)

[emma]

SUPER my teacher let me know this was gonna be on my midterm and i wanted to make sure i understood and u made me understand perfectly

[allyl]

for the second did you mean measure of angle a + c + b instead of a + c + ABC

[Adambkj]

Thanks for the vid; you got me ready for my test today!

[radishproductions]

thanks for sharing but don't you have to specify that m<ABC is congruent to itself by reflexive property before subtracting from both sides

[KronicDaily]

I have a question man, The triangle sum theorem is: Angle A + Angle B + Angle C = 180 degrees. Why did you write your answer as Angle A + Angle C + Angle ABC = 180

But wouldn't that exceed 180*? please get back to me.

[mirlandewilson]

I don't get how abc+bd equals 180 your confusing me!!!! Explain because wouldn't it be more than 180 degrees

[sahelriaz]

Thank u SOO much. Its easy and helpful

[dragontt]

Thanks, iwas having trouble, but now I'm fine