The inverse sine of sin(2pi/3) = 120degrees, correct?

One of the same side angles of two parallel lines is 20° smaller than the other one. find the measures of these two angles.

Can someone me and do the problem plz so i can understand it more better

In right ∆abc shown below, the midpoint of hypotenuse ac is located at d and segment bd is drawn.if ab = 12 and bc = 16, then explain why bd = 10. hint: consider what you know about the diagonals of a rectangle.