CPM Homework Help : PC3 Problem 11-145

Points plotted on coordinate plane as follows: point, A, at (3, comma 3), point, B, at (negative 3, comma 0), point C, at (0, comma negative 1), point, D, at (negative 4, comma negative 4). In the diagram at right, points are plotted on a Cartesian grid. What are the polar coordinates of these points?

Hint:

Each point should be written in the form $(r, θ)$ , where $r$ is the distance from the point to the origin and $θ$ is the angle of rotation measured counterclockwise from the positive $x$ -axis.

More Help:

For points $A$ and $D$ , draw a segment from the point to the origin. Use the Pythagorean Theorem to determine r and inverse tangent to determine $θ$ .