107 degree + ? = 180 degree (adjacent angles on stright line )
? = 180-107
= 73 degree
the angle next to 107 degree is 73 degree
since the angle next to 107 degree is in the triangle ,
we can use angle sum of triangle to solve this problem
the angle oppsite to angle A degree is
a=a ( vertical oppsite angle )
therefore the angle oppsite to a degree is also a degree
after that we finall need to find the sum of a + b
you should know that the sum of the angle degree in a triangle is 180 degree , right ?
threrefore
a degree + b degree + 73 degree = 180 degree (angle sum of triangle)
a+ b= 180-73
=107 degree
therefore the sum of a degree + b degree is 107 degree
