Well. That was unnecessarily convoluted and inefficient. Here is the easier way. Label the angles along the top line above the triangle, left to right, a, b, and c. Since they form a line, their sum is 180. Angles a and c are congruent to the triangle's lower right and left angles, respectively, because of the parallel lines theorem. Angle b is congruent to the to angle at the top of the triangle because they are vertical angles. So the triangle consists of three angles congruent to a, b, and c, which we know add up to 180. Therefore the triangle has 180 degrees.

He's not on the triangle sum theorem yet. He's just explaining things differently before the sum theorem in his next videos. Man people don't watch how he teach in each of his videos. Stop acting smarter than the teacher. Go make your own videos.

Found this video while teaching my son about this. Not sure if talking about x+y from 3:53 is nessesary. Confusing. After proved x == 'x', he can easily say angle C is equal to the angle next y, called 'z'. 'x' + y + 'z' =180, therefore A+B+C=180.

Hey, when you do, "x+y+? = 180", where do we get the 180 from? Seems like the whole proof is dependent on the 180. I assume it is from a circle, since that half of a circle and can been seen in the drawing. I ask because what is the proof that circle is 360 degrees? Seems like a number was chosen and not a real proof to prove that a circle is 360 degrees and nothing else. Can I get some clarity on this.

is there a name for this proof?

@SuCKeRPunCH187

Pythagorean theorem.

no!! there is no name for this proof

Pythagorean theorem is only for right triangles

يابن اللعيبه!

Nah! .I did -20 lbs in 1 week.More here hawght.so#6nbNj41

Wow! .I did -40 lbs in 2 month.Visit hawght.so#b4TshQ1

Xa79MBTIOnqssdlJH

Triangle Angle Sum Theorem

Why is it needed to say 'from both sides' in this context?

i still dont get why me why me why me im so stupid

the vid gliched

The Pythagorean theorem is a squared+b squared=c squared. It's used to measure right triangles sides lengths. E.g. A=3 B=4 C=5

Well. That was unnecessarily convoluted and inefficient.

Here is the easier way. Label the angles along the top line above the triangle, left to right, a, b, and c. Since they form a line, their sum is 180. Angles a and c are congruent to the triangle's lower right and left angles, respectively, because of the parallel lines theorem. Angle b is congruent to the to angle at the top of the triangle because they are vertical angles. So the triangle consists of three angles congruent to a, b, and c, which we know add up to 180. Therefore the triangle has 180 degrees.

it doesnt help you on notihng

couldn't someone just add the angles inside the triangles and be done with it?

this guyz thing is trash

I don't understand how he explains how to do it

caus hugo cant understand math ge is stupid booo

I am 17. Today, I got to know why is the sum of interior angles of a triangle is 180

gud to understand

That was helpful

Something i didnt heat from the top section of the comments

that was a waste of my time

what what does the word 'argument' actually??? the things or issue we're talking about??

This is a little hard .The method we studied in school is easier .

that was good

That is really neat.

Hai

He's not on the triangle sum theorem yet. He's just explaining things differently before the sum theorem in his next videos. Man people don't watch how he teach in each of his videos. Stop acting smarter than the teacher. Go make your own videos.

You are complicated

you are a master of mathematics.now the only thing i see on youtube is khan academy

Found this video while teaching my son about this. Not sure if talking about x+y from 3:53 is nessesary. Confusing. After proved x == 'x', he can easily say angle C is equal to the angle next y, called 'z'. 'x' + y + 'z' =180, therefore A+B+C=180.

Hey, when you do, "x+y+? = 180", where do we get the 180 from? Seems like the whole proof is dependent on the 180. I assume it is from a circle, since that half of a circle and can been seen in the drawing. I ask because what is the proof that circle is 360 degrees? Seems like a number was chosen and not a real proof to prove that a circle is 360 degrees and nothing else. Can I get some clarity on this.

Ah yes, The Tostitos Method™. Very nice! Maximum crunchitude achieved!