Find the missing angle measures.
What is m∠1?
a. 50
b. 105
c. 100
d. 60

Answer: C
Step-by-step explanation:
we know that the third angle of the triangle with 50 and 50 degrees is 80 because a triangle has 180 degrees. we also know that 80 + the measure of angle 1 = 180 and 80 + 100=180