circles Flashcards
1
Q
vertex at center
A
equal to arc
2
Q
vertex on circle
A
half arc it intercepts
3
Q
vertex inside circle
A
1/2 sum of opp arcs
4
Q
vertex outside circle
A
1/2 diff arcs
5
Q
circumference
A
2πr
6
Q
sin
cos
tan
A
oh
ah
oa
7
Q
90
x √3
60 2x 30
A
90
x x
45 √2 45
