If a circle touching all the `n` sides of a polygon of perimeter `2p` has radius `r` , then the area of the poly-gon is `(p-n)r` (b) `p r` (c) `(2p-n)r` (d) `(p+n)r`

If a circle touching all the n sides of a polygon of perimeter 2p has radius r, then the area of the poly-gon is (p-n)r( b) pr(c)(2p-n)r (d) (p+n)r

A circle of radius r is inscribed in a regular polygon with n sides (the circle touches all sides of the polygon). If the perimeter of the polygon is p, then the area of the polygon is

If ^n P_r=^n P_(r+1)a n d^n C_r=^n C_(r-1,) then the value of n+r is.

If ^n P_r=^n P_(r+1)a n d^n C_r=^n C_(r-1,) then the value of n+r is.

If ^n P_r=^n P_(r+1)a n d^n C_r=^n C_(r-1,) then the value of n+r is.

If .^n P_r=^n P_(r+1) and .^n C_r=^n C_(r-1,) then the value of n+r is.

If n P_r=^n P_(r+1) and n C_r=^n C_(r-1,) then the value of (n+r) is.

If S be the sum P the product and R be the sum of the reciprocals of n terms of a GP then p^(2) is equal to S/R b.R/S c.(R/S)^(n) d.(S/R)^(n)

The number of permutations of n different things taking r at a time when 3 particular things are to be included is ^(n-3)P_(r-3) b.n-3P_(r) c.^(n)P_(r-3) d.r!^(n-3)C_(r-3)

P Q R S is a trapezium having P S\ a n d\ Q R as parallel sides. A is any point on P Q\ a n d\ B is a point on S R such that A B Q R . If area of P B Q is 17\ c m^2, find the area of \ A S R