Step-by-step explanation:
Let the angle near point A be
.
Let the angle near point B be
.
Let the angle near point C be
.
Let the external angle near point A be
.
Let the external angle near point B be
.
Let the external angle near point C be
.
According to exterior angle property,exterior angle of an angle is the sum of other two angles.
So,

According to angle sum property,the sum of angles in the triangle add to 

The grandfather would be your parents.Hope it helps :)
Answer:
WANNA HEAR SOME METAL
Step-by-step explanation:
WANNA HEAR ME ROAAAAAAAAAAAAAAAAAR
Answer:
24
Step-by-step explanation:
x+120+36=180
x+156=180
x=180-156
x=24