4.1 (Angles & Their Measures) Flashcards
1
Q
degrees to radians
A
radians = degrees x (pi/180 [degrees])
2
Q
radians to degrees
A
degrees = radians x (180/pi)
3
Q
basic degree-radian conversion
A
360 = 2 pi radians
4
Q
basic DMS conversion
A
1 hr = 1 degree = 60’ = 3600”
5
Q
arc length
A
S = rθ
6
Q
sector area
A
K = 1/2 r^2 θ
7
Q
About what does one rad. equal? (To the nearest tenth degree)
A
57.3 degrees
