standard_description: Derive using similarity the fact that the length of the arc intercepted by an angle is proportional to the radius, and define the radian measure of the angle as the constant of proportionality; derive the formula for the area of a sector.
problem_activity: Coordinates for points are shown in the table.
|          Point           | Coordinate |
|--------------------------|------------|
| *           W          * |   (2, 3)   |
| *           X          * |   (4, 0)   |
| *           Y          * |   (5, 2)   |
| *           Z          * |   (0, 1)   |
Graph all the points from the table in the coordinate grid. Label them with their corresponding letters.
[IMG]


aligns: no