Kevin counts 75 chicks in the hen house. He also sees more chicks outside the hen house. How can Kevin count to find how many chicks in all? We counted by 1s and in all there are 108 chicks. The question is: what do we know about the chicks? What do you need to find?

What we know:

we know that there are 75 chicks in the hen house, we also know that in all there are 108 chicks

What we need to find:

we need to find out how many chicks were outside

Answer equation:

108 - 75 = 33

< 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⭐