Triangle Congruence Theorems: ASA or AAS?

On this triangle congruence lesson, you will learn the difference between the Angle-Angle-Side AAS theorem and the Angle-Side-Angle ASA theorem (also known as the asa postulate) when proving triangle congruence and what are same side interior angles?

This lesson answers the questions: How do I prove that two triangles are congruent? What is ASA? What is AAS? What is the difference between ASA and AAS?

Our lessons are perfect for flipped classroom math teachers and students. This lesson is aligned with the common core learning standards for math and the SAT math curriculum as well.

[EL-nnff]

Great job on this! You taught me more in two minutes than my teacher in a whole class

[unbiasedcommentary]

This honestly taught me more then my entire hour and a half lecture in geometry

[Ajaykumar-cjyn]

I m from India.. Really very thank u. I was so confused in this. I literally liked your figures and how u compared them 🤗🤗

[mymiddlenameissebastian]

Thanks dude I have a test tomorrow and this really helped me out

[jacobdidonato]

Thank you so much, I'm in Geometry and I have a test soon and these two I always mixed up. Great job.

[evakarnowski]

Bless you and thank you so much. I have my Geometry final tomorrow and I always get these two mixed up.

[AbrahamA]

Omg finally someone who can teach something I’m not even joking I’ve been looking all over YouTube just for a video like this

[VIDHUSHAMKRATHGRADEVIII]

These two congruences always confused me... Even my math teacher and my tuition mam couldn't explain it properly and patiently like u... Thank you very much... Wish me luck for tmrw's exam.
-love frm India❤

[gyanendrasingh]

Thank you bro ....very very very thank you explaned it so clearly that i will remember it for rest of my life ...i want to write more but tommorrow is my maths exam so ending up here ...THANK YOU AGAIN !!!!

[airajuanson]

very helpful!! Learned a lot more in 2 minutes than staring at my book for 10 minutes. Thanks a lot

[Anniecurls]

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[dharinir]

Thankyou so very much for the clear and concise explanation!!

[ecofreak_official]

Thank you so much, my little sister needed help with her homework and I couldn't remember how to solve. This helped a ton!

[sut]

U cleared my doubt of years in less than 2 mins! Thank you so much. I have an exam tomorrow, wish me the best🙏

[TM_editsMEms]

Thank you sir for clearing my confusion

[kareemalenezi]

Thankyou very much this helped me alot! I have a Test tomorrow and I needed this lesson to be explained also. Stay Safe everybody #CoronaVirus

[thamanbh]

Thanks a lot. That was a very neat and clear explanation in just two minutes. That was great
Thanks again.

[atiyabegum]

Thanks for teaching in such an easy I have maths exam on Sunday..

[Sproket]

Dude, you're a king. I learned more in two minutes than in three weeks.

[bennyw]

Thanks this really helped me a lot for my 8th grade Geometry Test!