Asquare and a circle are used as sample designs for a tiling project. the length of an edge of a square is two times the length of the radius of a circle.

find the ratio of the area of the circle to the area of square using the given radii.

select either choice 'a' or choice 'b'

For radius x, Choice 'A' π/4 is the correct answer.

For radius 10x, Choice 'B' π/4 is the correct answer.

For radius 100x, Choice 'B' π/4 is the correct answer.

Step-by-step explanation:

The Area of the circle = πr^2, where "r" is the length of the radius.

The Area of square = a^2, where "a" is the length of an edge of a square.

CASE 1 :

Substitute radius r = x and edge length a = 2x,

Area of circle = π*x*x = πx^2

Area of square = 2x*2x = 4x^2

The ratio of the area of the circle to the area of square = πx^2 / 4x^2 = π/4

Choice 'A' π/4 is the correct answer.

CASE 2 :

Substitute radius r = 10x and edge length a = 20x,

Area of circle = π*10x*10x = 100πx^2

Area of square = 20x*20x = 400x^2

Ratio of the area of the circle to the area of square = 100πx^2 / 400x^2

                                                                                         = π/4

Choice 'B' π/4 is the correct answer.

CASE 3 :

Substitute radius r = 100x and edge length a = 200x,

Area of circle = π*100x*100x = 10000πx^2

Area of square = 200x*200x = 40000x^2

Ratio of area of the circle to the area of square = 10000πx^2 / 40000x^2

                                                                                  = π/4

Choice 'B' π/4 is the correct answer.

b

step-by-step explanation:

4.5%

step-by-step explanation: