Standard Position, Coterminal and Reference Angles-!!

coterminal angles

two angles that have the same terminal side.

Quadrantal angle

- if the terminal side of an angle lies on the axis (like a 90 or 180 degree angle).

initial side

- the ray on the x-axis of an angle in standard position.

terminal side

- the ray that rotates in an angle in standard position.

-250 degrees

Find largest negative angle cotermina1 angle to 470 degrees

-200 degrees

Find largest negative cotermina1 angle to 160 degrees

260 degrees

Find smallest positive cotermina1 angle to -820 degrees

60 degrees

Find the reference angle of -480 degrees

reference angle

an acute angle formed by the terminal side of the given angle and the x-axis.

clockwise angle measurement

the measurement of the angle is negative

Counterclockwise angle measurement

the measurement of the angle is positive

standard position

- an angle is in standard postion if its vertex is located at the origin and one ray is on the positive x-axis.