The picture shows a circle divided into 9 equal wedges which are rearranged.
The radius of a circle is and its circumference is 2π. How does the picture help to explain why the area of the circle is πr²?

Explanation:

The usual definition of pi is the ratio of the circumference of a circle to its diameter, so that the circumference of a circle is pi times the diameter, or 2 pi times the radius. This give a geometric justification that the area of a circle really is "pi r squared".

Area of a circle. In geometry, the area enclosed by a circle of radius r is π r2.

One method of deriving this formula, which originated with Archimedes, involves viewing the circle as the limit of a sequence of regular polygons.

Hope this helps~

the answer would be 150 books

step-by-step explanation:

if you divide 300 by 2 you will get 150