The 117 students touring a museum are separated into 3 equal groups. Their teacher decides to put 39 students in each group. Use estimation to determine if this answer seems reasonable.

< 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

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entering that problem on the tube might get you an answer

the barter

the diameter is 16 cm. are you a teacher?

step-by-step explanation: