Before sending track and field athletes to the Olympics, the U. S. holds a qualifying meet. The upper dot plot shows the distances (in meters) of the top 888 shot putters in the preliminary round of the 201220122012 Olympic games. The lower dot plot shows the top 888 throwers in the shot put at the U. S. qualifying meet

< 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⭐

its an acute right triangle

step-by-step explanation: