How to determine the similarity of three triangles by drawing the altitude

Learn about the geometric mean of numbers. The geometric mean of n numbers is the nth root of the product of the numbers. To find the geometric mean of n numbers, we first multiply the numbers and then take the nth root of the product.

[alexistorres]

I was curious to see how this guy teaches this topic. If by far one of the most challenging for many students. Great job man. I love how you told someone “can you wait two seconds for that?”

[korok]

"Does that make sense Guillermo?.. Guillermo? Make a little sense?" Freaking hilarious

[physicsxpro]

I am from India but I easly understood your language and topic. thanks sir

[flicker]

I have a teacher who won't help us. My friend asks for help and she denys her all the time. This helped so much thank you

[kevinshanananayo]

Sir I'm really thankful for your math lessons cuz I really understand it and that's great 😊

[LummaM]

You are a life savior thank you so much

[antonspriednieks]

If my teacher ask for proof, I will point to this video 😀
Seriously, by the way, you are legend! And yes, this video is still making an impact after 9 years. I got one step closer to do my studies today!

[Blast-gpzq]

I was trying to find the answer to something else but seeing simaler in this video made me realize

[zwurka]

Thanks slept in class during notes and woke up with regret and knowing I was gonna fail the rest

[LouisP-jhib]

It would be important to explain why the three triangles are similar not just say they look similar.

[BrittanyPunches-hkoh]

You mentioned that the altitude doesn't have to be from the midpoint. Does anything change if it is?

[tonyduarte]

A good math teacher wouldn't push their students to answer "yes I see that they are similar triangles" when it is obvious just by the sounds that they are not convinced. It is easy to demonstrate that all triangles have 2 equal angles and so prove that it is the case, instead the teacher rushes the student to just believe him that they are...this creates bad math habits to students than then start making "assumptions" they can't prove and that some times might be wrong.

[garrettc]

With I had this man as my current 9th grade teacher because my current teacher makes everybody’s ask her a question she doesn’t really like she makes them look stupid just ask her a question and says that she does it take favorites that she’s very open issues with her favorites are indirectly and she also says that she should get paid more than every teacher in the school and that she knows that she’s more important than everybody in my school but sometimes she’ll say that she’s no more important than a student in our school it’s really doesn’t make any sense to me and she is quite rude and waits till the day right before to tell Ashley is a test and take him to weeks to grade it I’m watching this video because I have a test tomorrow I did not know about and she still has it to our test grade in from two weeks ago in

[mirandakim]

youre kinda enforcing the idea that they are similar without proving them with actual geometric statements