Question

If m1=35° and m2=75°, what is m3?​

Answer 1

All angles of a triangle add up to 180°.

there m1+m2+m3=180°

35+75+m3=180

110°+m3=180°

m3=180°-110°

m3=70°

Answer is A.

Answer 2

m3 should be 70°

all internal angles of a triangle add up to 180

180-35-75 = 70