Area of a polygon

Find the Area of polygon

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 all the complex numbers z such that |z| = 1 and |(z)/(barz)+(barz)/(z)| = 1 are vertices of a polygon then the area of the polygon is K so [2k] is equals ( [.] denotes G.I.F.)

If all the complex numbers z such that |z|=1 and |(z)/(barz)+(barz)/(z)|=1 vertices of a polygon then the area of the polygon is K so that [2K] , ( [.] is GIF) equals

If the area of the polygon whose vertices are the solutions (in the complex plane) of the equation x^(7)+x^(6)+x^(5)+x^(4)+x^(3)+x^(2)+x+1=0 can be expressed in the simplest form as (a sqrt(b)+c)/(d), find the value of (a+b+c+d)

Find the area of polygon MNOPQR in the given figure if MP = 9 cm, MD = 7 cm,MC = 6 cm, MB = 4 cm, MA = 2 cm . NA, OC, QD and RB are perpendicularsto diagonal MP.

Find the area of polygon ABCDEF, if AD = 18cm, AQ = 14 cm, AP = 12 cm, AN = 8 cm, AM = 4 cm, and FM, EP, QC and BN are perpendiculars to diagonal AD.

No. of diagonals of a polygon are 170. No. of sides in this polygon are:

If the external angle of a polygon is 60° then the polygon is: