A signal can be formed by running different colored flags up a pole one about the other find the number of different signals consisting of 9 flags that can be made using for why flag three red flags and to Blue Flags ​

< coa = 150 ( given)

as ba and bc are tangents

so oc and oa is perpendicular to cb and ab respectively because in circle normal passes through centre

so in quadrilateral oabc

< coa + < oab + < ocb + < abc = 360

150 +90+90 + < abc = 360

330 + < abc = 360

< abc = 360 -330 = 30

so < abc = 30

⭐dhruv⭐

step-by-step explanation:

what grade level is this? need to know so i can look in my old textbooks!

answer: 8d

step-by-step explanation:

45+5= 50+5=55+5=60