Standard+Position

STANDARD POSITION:
 * The vertex of an angle is on the origin of the X and Y axis. One side of the angle is always fixed along the positive X-axis, in other words, going to the right along the axis in the 3 o'clock direction. This is the initial side of the angle.
 * Angles in standard position can be classified according to the quadrant that contains their terminal side. For example, an angle whose terminal side lies in the first quadrant is called a first quadrant angle. If the terminal side of an angle lies along one of the axes and it doesn't lie along a specific quadrant; but lies along the border of two quadrants, it is called a quadrantal angle.
 * Angles in standard position can be classified according to the quadrant that contains their terminal side. For example, an angle whose perminal side lies in the first quadrant is called a first quadrant angle.
 * [[image:geometrychapter9/standard-position_1.gif width="97" height="96"]] If the terminal side of an angle turns counterclockwise the angle is negative. If it turns clockwise it is positive.

Example: A lighthouse makes an angle of 130° from ship due north as shown in the figure. Find the location of the lighthouse in terms of an angle in standard position.

Correct Answer: 320 degrees Solution: The location of the lighthouse in terms of an angle in standard position is 360° - 40° = 320°.