The number of parallelograms that can be formed form a set of four parallel lines intersecting another set of three parallel lines is `6` b. `9` c. `12` d. 18

The number of parallelograms that can be formed from a set of four parallel lines intersecting another set of three parallel lines is:

The number of parallelograms that can be formed from a set of four parallel lines intersecting another set of three parallel lines is (i) 6 (ii) 18 (iii) 12 (iv) 9

Find the number of subsets that can be formed from the set A={4,5,6}

Assertion: If m parallel lines are intersected by n other parallel llines, then the number of parallelograms thus formed is (mn(m-1)(n-1))/4 , Reason: A selection of 4 lines 2 from m parallel lines and 2 from n parallel lines gives one parallelogram. (A) Both A and R are true and R is the correct explanation of A (B) Both A and R are true R is not the correct explanation of A (C) A is true but R is false. (D) A is false but R is true.

A parallelogram is cut by two set of n parallel lines, parallel to the sides of the parallelo-gram. The number of parallelograms formed is

Find, which of the following sets are empty : The set of points of intersection of two parallel lines.

The parallelogram is cut by two sets of m lines parallel to its sides. The numbers parallelogram thus formed, is

Lines are parallel, if they do not intersect' is stated in the form of

l\ a n d\ m are two parallel lines intersected by another pair of parallel lines p\ a n d\ q as shown in figure. Show that A B C~= C D A

A transversal intersects two parallel lines. Prove that the bisectors of any pair of corresponding angles so formed are parallel.