Angle Vocab
Vertex
How many radians are in a full revolution?
2pi
Complementary angles add up to ___ degrees
90
A reference angle is measured from what two parts?
Terminal side and x-axis
Give a negative coterminal angle with 60o
-300o
Where is the vertex in standard position?
on (0,0)
pi/3
is in what quadrant?
Quadrant I
How many degrees are in a full rotation?
360 degrees
What is the reference angle for 150 degrees?
30 degrees
Give a positive coterminal angle with -250 degrees
110 degrees
Where is the initial side in standard position?
on the positive x-axis
Acute angles are between ____ and ____ radians
0 and
pi/2
Converting from degrees to radians multiply by _____
pi/180
What is the reference angle for - 285 degrees?
75 degrees
Give a positive coterminal angle with 3pi/5
13pi/5
Positive angles are measured in which direction? (give the word or draw a picture)
counterclockwise
Obtuse angles are between ____ and ____ radians
pi/2
and
pi
Converting from radians to degrees multiply by _____
180/pi
What is the reference angle for -11pi/6?
pi/6
Give a negative coterminal angle with 13pi/6
-11pi/6
Negative angles are measured in which direction (picture or word)?
clockwise direction
Supplementary angles add to ____ radians
pi
convert
(8pi)/3
to degrees
480 degrees
What is the reference angle for 5pi/9?
4pi/9
Give a positive coterminal angle with -15pi/2
pi/2