Question

please explain your answer and please make sure you don't make a mistake that will confuse me thankyou

Answer 1

120

Explanation:

all triangles inside angles are equal to 180, because you can tell by looking at it, all the angles in this triangle are the same. so 180 divide by 3 is 60. 60⁰ is the angle for the inside part, but you need the outside. So 180⁰ (the angle of a straight line) minus 60 is 120⁰.