The graph of x^2/4-y^2/4=1 is an example of which type of conic section?

In the given triangle, ∠aed ∼ ∠ abc, ad = 6.9, ae = 7.2, de = 5.2, and bc = 10.2. find the measure of bd and ce. round your answer to the nearest tenth.

Segment wx is shown explain how you would construct a perpendicular bisector of wx using a compass and a straightedge

What is the surface area of the sphere?