一羊被4米的绳子拴在长4米,宽2米的长方形建筑物的一个顶点上,建筑物的周围都是草地,这羊能吃到草的面4²π×(270÷360)+2²π×(90÷360)=13π(m²)但我不明白为什么这里是3/4,那里是1/
来源:学生作业帮助网 编辑:作业帮 时间:2024/07/13 05:48:17
![一羊被4米的绳子拴在长4米,宽2米的长方形建筑物的一个顶点上,建筑物的周围都是草地,这羊能吃到草的面4²π×(270÷360)+2²π×(90÷360)=13π(m²)但我不明白为什么这里是3/4,那里是1/](/uploads/image/z/6814082-2-2.jpg?t=%E4%B8%80%E7%BE%8A%E8%A2%AB4%E7%B1%B3%E7%9A%84%E7%BB%B3%E5%AD%90%E6%8B%B4%E5%9C%A8%E9%95%BF4%E7%B1%B3%2C%E5%AE%BD2%E7%B1%B3%E7%9A%84%E9%95%BF%E6%96%B9%E5%BD%A2%E5%BB%BA%E7%AD%91%E7%89%A9%E7%9A%84%E4%B8%80%E4%B8%AA%E9%A1%B6%E7%82%B9%E4%B8%8A%2C%E5%BB%BA%E7%AD%91%E7%89%A9%E7%9A%84%E5%91%A8%E5%9B%B4%E9%83%BD%E6%98%AF%E8%8D%89%E5%9C%B0%2C%E8%BF%99%E7%BE%8A%E8%83%BD%E5%90%83%E5%88%B0%E8%8D%89%E7%9A%84%E9%9D%A24%26%23178%3B%CF%80%C3%97%EF%BC%88270%C3%B7360%EF%BC%89%2B2%26%23178%3B%CF%80%C3%97%EF%BC%8890%C3%B7360%EF%BC%89%3D13%CF%80%28m%26%23178%3B%29%E4%BD%86%E6%88%91%E4%B8%8D%E6%98%8E%E7%99%BD%E4%B8%BA%E4%BB%80%E4%B9%88%E8%BF%99%E9%87%8C%E6%98%AF3%2F4%2C%E9%82%A3%E9%87%8C%E6%98%AF1%2F)
xSQOP+ѱv]- 0mױcaL|
G
l,hG7xGۮOCy!ܗss+lSwO[{pn̹!ݫ8G>a2Λ&moQ[qO{՝mBx+;zZ[6hm?=];ڴR}mq7o1nG?{kp}#<굌Q| _ K:LEbegm]omv%O.~i/owtEpɍtfrH},pCiUN0L*JRٙl>ӈ0S鄜eF}|O@ɧ'$Hj2&$HCxEcXEAӢHKDLPUQ<́ZZ?+D )q"h*b8k~8"wvNmc̃O-]k)Uǃ {P f(