Which triangles are similar

How can you find the magnitude of a vector, v = < x,y > , where the horizontal change is x and the vertical change is y?

Find the axis symmetry of x y=4x-6x+3

The equatorial radius of earth is approximately 6 × 10^3 km, while the equatorial radius of saturn is approximately 6 × 10^4 km. which of the following is true? a. the equatorial radius of saturn is approximately one hundred times that of earth. b. the equatorial radius of saturn is approximately ten times that of earth. c. the equatorial radius of earth is approximately one hundred times that of saturn. d. the equatorial radius of earth is approximately ten times that of saturn.