help Please
explain how to do

Answer:
x = 110
Step-by-step explanation:
all angles of the triangle MUST add up to 180 degrees.
45 + 65 = 110
180 - 110 = 70
since x is sittling on a 180 degree angle, the sum of 70 and x must equal 180 too
180 - 70 = 110
Answer:
70°
Step-by-step explanation:
we know that the angles in a triangle are equal to 180° and that a straight line has 180°.
180-(65+45)=110
this equation should give us the angle opposite x(the supplementary angle)
180=the sum of the angles on a straight line so
180-110=70