Do the ratios 10/8 and 16/20 form a proportion
yes or no?

Aperpendicular bisector, cd is drawn through point con ab if the coordinates of point a are (-3, 2) and the coordinates of point b are (7,6), the x-intercept of cd is point lies on cd.

Can someone me with these two circle theorem questions asap?

The measure of angle 0 is 600 degrees