ABCD is a square, the length of which is 10. DE is a quarter arc with C as the center and CD as the radius. EF is a quarter arc with B as the center and BE as the radius. FG is a quarter arc with A as the center AF as the radius. GH is a quarter arc with D as the center DG as the radius. What is the total length of arcs DE + EF + FG + GH?
-
数学PS
-
ABCD is a square, the length of which is 10. DE is a quarter arc with C as the center and CD as the radius. EF is a quarter arc with B as the center and BE as the radius. FG is a quarter arc with A as the center AF as the radius. GH is a quarter arc with D as the center DG as the radius. What is the total length of arcs DE + EF + FG + GH?
显示答案
正确答案: E