Triangle Proportionality Theorem - YourTeacher.com - Math Help

[icecreamsundae329]

midterm tomorrow!  thanks!!!

[bleachmaster101]

My savior to being absent at school >_>

[lynabaya]

It's funny how I can easily understand this lesson with just a minute of this video, yet i can't absorb what my math teacher is talking about within an hour of math class

[eze1231000]

THANK YOU :) NO WORDS CAN EXPRESS MY GRATITUDE TO YOU

[FIamingTwinkie]

@eze1231000 SAME HERE! I HAVE A HUGE TEST TOMORROW! WISH ME LUCK :)

[TheCalichic9]

well that was pretty easy! 

[djbamx2]

she sound's like a freakin' robot

[joshuazucker]

In my experience as a teacher, if you teach this theorem then kids make mistakes later because they forget to modify the relationship when they want to investigate the ratio of the third side. The theorem you cite is a nice shortcut, but that ratio only applies to two of the three sides of the triangle. If you keep to just one theorem, the similarity, you get a more powerful result and fewer things to memorize.

[royalbrandon]

simplified divide 15/10 and that gives you 1.5 then multiply 8 by 1.5 and you get 12

make sure to do it with the corresponding sides

[acmilanshevachels]

I don't understand why they have to make these videos so awkward for the instructors and the viewers. The tonality of the voice and the awkward creepy smile at the end.. that's just unappealing.

[smurfyday]

@acmilanshevachels She looked like a hostage there.

[joshuazucker]

At least in my book, the similarity gives you 8/(8+x) = 10/(10+15), and it takes a bit of algebra to simplify it to the 8/x = 10/15. Sometimes it's a serious mistake to use only pieces of a side instead of the whole side of the triangle! In this case it works out the same, though.

[yesila1]

@joshuazucker She was NOT using similarity of the triangles. She instead was using proportionality of the way the sides were divided. You could prove the proportionality of those divisions by using the proportionality given by the similar triangles OR if you already know that fact you can just use it. She choose to just use the fact.

[yesila1]

@joshuazucker She was NOT using similarity of the triangles. She instead was using proportionality of the way the sides were divided, this relies heavily on the divisions being created by Parallel lines . You could prove the proportionality of those divisions by using the proportionality given by the similar triangles OR if you already know that fact you can just use it, she just used the fact.

If the sides were not split using parallel lines you are right, we shouldn't expect proportionality

[SuperAsher10]

who knows how to do math

do you have success maker by computers in school

[SuperAsher10]

this not understandable!@#$%^&*()_+

[gesnelson15]

her voice is so dame annoying

[abedolla777]

@gesnelson15 hey u stop saying stuff like that

[2KGArtistry]

how do you get the parallel lines?

[NEBEAST81]

Wow, you made this seem so...simple!

[arianinha69br]

You sould really put like, Theorem Of Pythagoras for ALL types of triangles on a vieo.. It"ll help problem

[grig24x]

how do you solve all sides with numbers?

[emma0able]

you dont need to solve them anymore coz they are already given. you can only solve when the number of a side is missing. its the purpose of giving the problem.

[grig24x]

Thanks.

[tcwright00]

Wonderful refresher! Thank you!