16)what is the distance between the points A(c,0) and b(0,-c)?
17)find the point on x-axis which is equidistant from the points (2,-5) and (-2,9)0
18)find the value of a so that the point (3,a) lies on the line represented by 2x-3y=5.
19)pointP divides the line segment joining the points A(-1,3) and B(9,8) such that AP/PB=k/1.If P lies on the line x-y+"=0 , find the value of k>
20)if the points (p,q);(m,n) and (p-m,q-n) are collinear .show that pn=qm.
21)if P(2,p) is the midpoint of the line segment joining the points A(6,-5) and B(-2,11) ,find the value ofp.