Draw different pairs of circles. How many points does each pair have in common ? What is the maximum number of common points ?

How many mid points does the segment have?

Maize has 10 pairs of chromosomes.How many linkage groups does it have ?

Two lines having a common point is called :

How many solutions does the pair of equations x+y=1 and x+y=-5 have ?

Let R be a rectangle , C be a circle, and T be a triangle in the plane. The maximum number of points common to the perimeter of R,C, and T is

If two circles intersect at two distinct points , then the number of common tangents is __________.

Suppose that two circles C_(1) and C_(2) in a plane have no points in common. Then

Two circles touch each other externally. Prove that the lengths of the tangent drawn to the two circles from any point on the common tangent lie at the point of contact of two circles are equal .