Find the missing measure for a right circular cone given the following information.
find h ifr=5 and v = 100.
4
12
30

< 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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answer: d.) the total number of protons and neutrons is 15

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