7. Write the following statements in conditional form. (i) Every rhombus is a square. (ii) Angles in a linear pair are supplementary. (iii) A triangle is a figure formed by three segments. (iv) A number having only two divisors is called a prime number. 8. Write the converse of each of the following statements. (i) If the sum of measures of angles in a figure is 1800 , then the figure is a triangle. (ii) If the sum of measures of two angles is 900 then they are complement of each other. (iii) If the corresponding angles formed by a transversal of two lines are congruent then the two lines are parallel. (iv) If the sum of the digits of a number is divisible by 3 then the number is divisible by 3. 9. Write the antecedent (given part) and the consequent (part to be proved) in the following statements. (i) If all sides of a triangle are congruent then its all angles are congruent. (ii) The diagonals of a parallelogram bisect each other