Answer:
A:
Y= 60°
X= 40°
B:
Y and 120 are on a straight line and a straight line equals 180° so 180° subtracted by 120° is 60°. all three X's are also on a straight line with the 60° (Y) so we know that 120° is left so you divide 120° by 3 and that equals 40°.
