Art of Problem Solving: Angles in a Parallelogram

Art of Problem Solving's Richard Rusczyk explores the angles of a parallelogram.

[Okaythankyougoodbye]

Its been years and still very helpful! Thank you

[autistitello]

I got the answer to the math problem I was stuck on in 5 seconds. Really good at explaining stuff...😏

[sallyxu]

honestly there is so much sarcasm in his voice at 1:40

[holidayrap]

Very well taught. But, question: Why are we learning this stuff in grade school? Instead of other number related skills like: how to balance a statement or check book, what a mortgage is, avoiding debt, trading stocks, currency exchange, depreciation, compound interest, investing etc. Asking for a friend. Thanks.

[mathman]

Richard: Thanks for your "Art of Problem Solving" books. I'm using the 1st book in the series to prepare my middle school students for Math Olympiad.

[AVTARCHANDER]

Excellent idea  to express  in very simple way instead of complicated, for bring clarity in understanding the concept .  Hope you will display  more such videos in future

[paigelees]

thank you this video helped me a lot for my test that's coming up

[lorrainelevine]

Fabulous. Understood and found it really interesting.Geometry was always a problem, but proofing it really helped.

[iblamej]

That thumbnail is the only reason I’m in college now

[Shahidproj]

THE AMOUNT OF PAIN YOU RELIVED ME FROM IS AMAZING

[yashdaryani]

Thanks soo much for this awesome explanation!👍🏻

[lubnasarah]

it's so good and very much helpful

[jackcotter]

Thank god for YouTube videos like this

[alexislovesyou]

YOU SAVED MY LIFE. Nest video I saw about these.

[sillybilly]

So I'm here because I'm failing geometry....

[rexivanbernales]

How would you connect your knowledge in solving for the angles of parallelograms in your daily life?

[luiscarlostabian]

this is just the basics guys.
prepare for something harder

[NanusVibes]

I was looking for a good video and here it is
Thanks

[nintendomaster]

Thank you for this! But I have 1 question,
When you were trying to prove the quadrilateral to be a parallelogram, I understand that they give you the opposite angles are equal. But then how did you figure out that you had to do 2x+2y=360? I mean I understand that the angles have to be 360, but what's the reason behind doing that? What went through your head to figure out that In order to prove the lines are parallel, I have to use 2x+2y=360?

Thank you again!

[beautyofislam]

You are very good teacher, Thank you. Love from India.🇮🇳