How to find the radius and diameter when the question giving you the area of a circle?

Aregular hexagon rotates counterclockwise about its center. it turns through angles greater than 0° and less than or equal to 360°. at how many different angles will the hexagon map onto itself?

The triangles are similar. what is the value of x? show your work.

The table represents a function f(x). what is f(3)? a.-9 b.-1 c.1 d.9