Find the missing angle or find X?

In the diagram of circle a what is m

Plz determine whether the polynomial is a difference of squares and if it is, factor it. y2 – 196 is a difference of squares: (y + 14)2 is a difference of squares: (y – 14)2 is a difference of squares: (y + 14)(y – 14) is not a difference of squares

For the inequality |c| < |d| to be true, which of the following must be true?