S is 3cm. n is 7
what is A?

area of regular polygons

Calculating the area of a regular polygon can be as simple as finding the ... Perimeter = s + s + s + s + s ... Area of a polygon using the formula: A = (L2 n)/[4 tan (180/n)] ... 600√3 cm 2.

the answer is 8.64

step-by-step explanation:

answer: (-8,4) are the coordinates of a

step-by-step explanation:

let the side of square abcd is x .

thus the area of square abcd is .

now, by the diagram area of triangle ead= 1/2 × ea × ad = 1/2 × ea × x

( because ad is the side of square)

and, according to the question,

the areas of square abcd and right ead are equal.

⇒

⇒ea=2x

thus, ea: ab=2: 1

therefore, point a divides line segment eb into the ratio 2: 1.

⇒ by sectional formula coordinates of a are,

=

=

=(-8, 4)

thus the coordinates of a are (-8,4)