Fine the measure of each angle in the triangle

Given that ot =5, xt=12, and ox= 13 is xy tangent to circle o at t? explain.

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.

If (x-2) 2= 49, then x could be a. -9 b. -7 c.- 2 d. 5 e.9