Mathematics problems of summer homework of Jiangsu Education Press The figure below shows the cross section of a tool. The circumference of a circle is 62.8 cm. The area of a rectangle is equal to that of a circle. What is the cross section area of the handle of this tool?

Mathematics problems of summer homework of Jiangsu Education Press The figure below shows the cross section of a tool. The circumference of a circle is 62.8 cm. The area of a rectangle is equal to that of a circle. What is the cross section area of the handle of this tool?

Use your own brain, you will find that the problem is actually very simple, come on! I believe you can do it*_*

Which is prawn, give 5 points more before 20 o'clock tonight!
1 / 2 + 1 / 6 + 1 / 12 + 1 / 20 + 1 / 30 + 1 / 42 + 1 / 56 + 1 / 72 + 1 / 90

931 out of 980

How much is the answer to the 70-80 page problem of the science popularization press, I have less than 30 minutes