Maria is having eight friends come to her house for homemade pizza her favorite dough recipe serves three people here are the ingredients 1 3/4 cups flour 3/4 cup warm water 2 tsp yeast 1 tsp salt 1 tsp sugar How much water should she use to make enough dough for her and her guests

< 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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