What is the ratio of 3 circles to 4 triangles

3:4

Step-by-step explanation:

There are 3 circles and 4 triangles. As a fraction that 3/4, but it can be written as 3:4.

< 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⭐