For any triangle, the sum of all three angles equals 180 degrees. In a certain triangle, one angle measures 75 degrees and the second angle
measures four times as much as the third. What does the third angle
measure in degrees?

54

step-by-step explanation:

6x9

its 69.420

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⭐