Ineed with pythagorean theorem. if both the legs of a triangle are 5 and 7 and the hypotenuse is 13, is it a right triangle? i’m confused.

5^2+7^2=25+49=74

so 13^2=169

74 is not equare 169 so it is not a trainagle

< 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⭐

well what did you do it matters what you did : )

step-by-step explanation: