108. the area of a rectangle is 40 square units. the length of the rectangle is 10. write an equation that could be used to find the width of the rectangle.

-1, -2, -3, -4, -6

step-by-step explanation:

< 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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