State & prove exterior angle property of a triangle.
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the sun of interior angle 180
lete the angle be x y z and exterior angle of x be a
to prove x+z =a
x+y+z
=180 eq2
x+a=180. eq1
by subtracting eq 1 from eq 2
y+z-a =0
y+z=a
lete the angle be x y z and exterior angle of x be a
to prove x+z =a
x+y+z
=180 eq2
x+a=180. eq1
by subtracting eq 1 from eq 2
y+z-a =0
y+z=a
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