Need some help here... Image below. Please try and explain how you get the answer, as I do want to try and learn the material.

i think you divide 100 by 60 to get the answer for number 14 but im not sure

Step-by-step explanation:

answer: ouch. thats difficult

step-by-step explanation:

< 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⭐