Question

Theorem:-
The sum of the measures of all angles of a triangle is 180-​

Answer 1

Answer:

angle sum property of traingle is name of the theorem

Answer 2

yes;

to prove

let three consecutive angle be x

1st = x

2nd = x+1

3rd = x+2

then,

x+ x+1 +x+2 = 180

3x=180-3

x= 177/3

x= 59

so,

1st = 59°

2nd = x+1 = 59+1 = 60°

3rd = x+2 = 59+2 = 61°

Step-by-step explanation:

I hope it's helpful for you