Which relationship is always correct for the angles p, q, and r of triangle abc?

a) p + r = q
b) p + q + r = 180 degrees
c) p + q + r = 90 degrees
d) q + r = p

< 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⭐

answer: 40.95

step-by-step explanation: