Question

if abc is a tringle prove that sum of all angles of a triangle is 180​

Answer 1

Answer:

if ABC is a triangle

and all the sides are equal. (given)

then take angle A, B, C TO BE X.

=}a+b+c=180( interior angles of a triangle are 180)

a, b, c=x

x+x+x=180

3x=180

x=60

now add a, b, c

60+60+60=180

hence proved.

Answer 2

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