When you round a number which digit in the number you decide to round up or round down?

Answer :

When the number is 5 or greater then you round up.

When the number is less than 5 , then you round down.

to rewrite a literal equation you may need to divide by a number, or by a variable.

hope i .

< 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⭐