l and m are two parallel lines intersected by another pair of parallel lines p and q . Show that `DeltaABC~= DeltaCDA`.

Identity parallel lines

Two parallel lines differ by……….

A set of m parallel lines intersect another set of n parallel lines in a plane. The number of parallellograms formed is

l, m and n are three parallel lines intersected by the transversals p and q at A, B, C and D,E, F such that they make equal intercepts AB and BC on the transversal p. Show that the intercepts DE and EF on q are also equal.

If a set of in parallel lines intersect another set of parallel lines (not parallel to the lines in 1^("st") set) then find the number of parallelograms formed.

Angle between any two parallel lines is …………

If a set of 'm' parallel lines intersect another set of 'n' parallel lines (not parallel to the lines in the first set), then find the number of parallelograms formed in this lattice structure.

There are 10 parallel lines intersected by a family of 5 parallel lines. The number of parallelograms thus formed in the net work is