what is the sum of the all the angles of a triangle
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Answered by
0
Answer:
180 degrees
Step-by-step explanation:
Answered by
1
Answer:
The sum of the angles in a triangle is 180 degree.
Step-by-step explanation:
Theorem :- If ABC is a triangle then <)ABC + <)BCA + <)CAB = 180 degrees.
Proof :-
Draw line a through points A and B. Draw line b through point C and parallel to line a. (Then we will get a fig as shown)
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.
Hope this helps you.. :)
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vivek9514:
ya I hope this is BETTER
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