What is measure of arc abc in terms of x?

Could somebody me with this radical simplification?

Look at the hyperbola graphed below. the hyperbola gets very close to the red lines on the graph, but it never touches them. which term describes each of the red lines? o o o o a. asymptote b. directrix c. focus d. axis

Write two point-slope equations for the line passing through the points (6, 5) and (3, 1)