"A square is a rectangle with four congruent sides" (write this statement in each of the forms below) O hypothesis
O conclusion
O conditional
O inverse
O Converse
O contrapositive
O and biconditional

here

Step-by-step explanation:

here is the key

< 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⭐

6mm^3 or .6cm^3

      216

      /   \

  36     6

  /   \     /

6     6   6

factor trees are nice.