Answer:
BC
Step-by-step explanation:
A secant is a line which intersects the circle at 2 points
In the given diagram this is BC
They are equivalent. combine like terms on the first one and 9x-4x+25 can be simplified to 5x+25.
Answer:
90 degrees
Step-by-step explanation:
since angle A's exterior angle is 90 on a straight line then angle a is 90. 180-90=90 for the rest