The distance between the points $P(-1,1)$ and $Q(5,-7)$ is ........................

$qy+px+r=0$  রেখার ঢাল কোনটি?

If $A$ & $B$ are the points $(-3, 4)$ and $(2, 1)$, then the coordinates of the point $C$ on produced $AB$ such that $AC = 2BC$ are

If two opposite vertices of a square are (5, 4) and (1, -6) then the coordinates of its remaining two vertices are

BC এর মধ্যবিন্দু কত?