1. Divide a circle into several equal parts, cut along the radius, and form a rectangle. The circumference of the rectangle is not 24 cm or 84 cm. What is the area of the rectangle

1. Divide a circle into several equal parts, cut along the radius, and form a rectangle. The circumference of the rectangle is not 24 cm or 84 cm. What is the area of the rectangle

It's sunny and yellow,
The width of the rectangle is:
14 + 1) = 3 (CM)
The area of the rectangle is:
(3.14 × 3) × 3 = 28.26 (cm2)

Divide a circle into several small sectors, and then form an approximate rectangle. The circumference of the rectangle is 24.84 cm, and the area of the circle is () square cm
A. 56.52B. 1413C. 28.26D. 2826

Let the radius of a circle be xcm. & nbsp; & nbsp; 3.14 × 2x + 2x = 24.84, 2x × (3.14 + 1) = 24.84 & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 2x × 4.14 = 24.84, & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; & nbsp; 8.28x = 24.84, & nbsp; & nbsp; & nbsp; 8.28x △