Math, asked by pmtibrahim, 1 year ago

Prove that the sum of three angles of a triangle is 180⁰

Answers

Answered by rishimasharma123

Proof
Draw line a through points A and B. Draw line b through point C and parallel to line a.

Since lines a and b are parallel, <)BAC = <)B'CA and <)ABC = <)BCA'.
It is obvious that <)B'CA + <)ACB + <)BCA' = 180 degrees.
Thus <)ABC + <)BCA + <)CAB = 180 degrees.

rishimasharma123: but i can tell you how it can be drawn

rishimasharma123: should i

pmtibrahim: OK

pmtibrahim: hello..

rishimasharma123: yah

rishimasharma123: so draw 2 parallel lines ab and cd

rishimasharma123: then draw a tiangle between them and mak that triangle as ok wait its getting hard to explain

rishimasharma123: who is beautifulgirl1 u can ask her maybe she can help

pmtibrahim: hello

pmtibrahim: anyway thank u I will figure it out soon

Answered by Anonymous

It's simply Please see this picture In this I make easier the concept and also in the side I written with a pencil in this you have just 2 concept first draw a triangle than you observed that BC is a straight line and A is a point . Draw a line XY through the point A which is parallel to BC and then my pencil written concept come you see alternative angles and ST angle property

I Am Just MAKE IT Easier To UNDERSTAND AND IF YOU WRITE THIS In exam Your marks is safe

Hopefully it help You

please mark it as brainlest

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