Given Circle O
A and G are points of tangency
∠10 = 90
∠4 = 20
∠11 = 100
Arc BA = 60
Arc CD = 40
BG is perpendicular to AD
Find
Arc AB
Arc BC
Arc CD
Arc DE
Arc EF
Arc FG
Arc GH
Arc HI
Arc IA
∠1
∠2
∠3
∠4
∠5
∠6
∠7
∠8
∠9
∠10
∠11
∠12
∠13
∠14
∠15
∠16
∠17
∠18
∠19
∠20