两平行线长度:1.575x2=3.15半圆的周长:6.75x3.14=21.1953分线的长度:3.15+21.195=24.345~~24.35长方形的面积:1.575x6.75x2=21.2625半圆的面积:6.75x6.75x3.14x0.5=71.5333分线内区域的面积:21.2625+71.533=92.7955~~92.80