Answer: #7 is 130 and #8 is 85
All the angles in a triangle should add up to 180. Therefore, to find the degree of the missing angle, you must add the angles given and then subtract your answer from 180.
#7
30+20=50
180-50=130
The missing angle from the triangle and the angle you are trying to find measure the same degree
#8
180-155=25
60+25=85
180-85=95
180-95=85
Since the sum of both angles should add up to 180 to form the angle of a straight line, You subtract the 95 from 180 to find the remainder.
