i didnt understand the video properly - Maths - The Triangle and its Properties

Question

i didnt understand the video properly

Lalit Mehra · Accepted Answer

Hi!
The video explains the angle sum property of the triangle It
states that the sum of the measure of all the angles of a
triangle is 180° and its proof
The concept in the video has been explained in the logical and
simplest way Revisit the video and try to understand the concept
There are also some related videos in the Resource section
which would be beneficial in understanding the concept If you still
have problem in understanding the video properly, then do get back
to us mentioning the specific step(s) so that we can provide you a
meaningful help
Cheers!