如图，要在圆形花坛旁铺设一段水泥路（图中阴影部分）。水泥路的面积是多少？求各位大神怎么破！！谢谢！
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\u53f6\u72b6\u9634\u5f71\u90e8\u5206\u9762\u79ef\uff1a100-21.5\u00d72\uff1d100-43\uff1d57
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5×12-25π/4=60-25π/4
绛旓細12脳5锛90脳5²蟺梅360锛60-6.25蟺鈮40.375
绛旓細杩欐潯姘存偿璺殑闈㈢Н鏄細3.14X(6+1)²-3.14X6²=3.14X(49-36锛=3.14X13 =40.82骞虫柟绫
绛旓細鍐呭渾鍗婂緞锛10梅2=5锛堢背锛夛紝3.14脳[锛5+2锛塣2 -5 ^2]=蟺脳[49-25]=24蟺锛堝钩鏂圭背锛夆増75.36骞虫柟绫筹紱绛旓細杩欐潯璺殑闈㈢Н鏄24蟺骞虫柟绫虫垨75.36骞虫柟绫筹紟鍒嗘瀽锛氭牴鎹幆褰㈤潰绉=澶栧渾闈㈢Н-鍐呭渾闈㈢Н锛岄鍏堟牴鎹渾鐨勫懆闀垮叕寮忥細c=2蟺r锛屽凡鐭鍦嗗舰鑺卞潧鐨勭洿寰勬槸10绫筹紝姹傚嚭鑺卞潧鐨勫崐寰勶紝鑺卞潧鐨勫崐寰勫姞涓2...
绛旓細鎵浠ュ皬璺潰绉槸3.14脳6脳6-3.14脳4脳4=62.8骞虫柟绫
绛旓細鏍规嵁棰樺共鍙互鐢诲嚭杩欐潯灏忚矾濡傚浘鎵绀猴細鍒欏皬璺殑闈㈢Н涓猴細3.14脳[锛4+1锛2-42]锛=3.14脳[25-16]锛=3.14脳9锛=28.26锛堝钩鏂圭背锛夛紝绛旓細杩欐潯灏忚矾鐨勯潰绉槸28.26骞虫柟绫筹紟
绛旓細3.14脳锛8+2锛²-3.14脳8²=113.04骞虫柟绫 澶у渾闈㈢Н鍑忓幓灏忓渾闈㈢Н灏辩瓑浜庡渾鐜紙鍗虫按娉ヨ矾锛夌殑闈㈢Н
绛旓細10+0.8锛10.8锛堢背锛3.14脳锛10.8脳10.8-10脳10锛夛紳52.2496锛堝钩鏂圭背锛夌瓟锛氬皬璺殑闈㈢Н鏄52.2496骞虫柟绫炽
绛旓細鍦嗙幆闂 鍐呭渾鍗婂緞=6/2=3绫筹紝澶栧渾鍗婂緞=3+2=5绫 蟺 *5*5-蟺 *3*3=16蟺 鈮50.24骞虫柟绫 绛:杩欐潯姘存偿璺潰绉槸50.24骞虫柟绫.
绛旓細鑺卞潧鐨勫崐寰勶細8梅2=4锛堢背锛3.14脳锛4+1锛2-3.14脳42=3.14脳25-3.14脳16=78.5-50.24=28.26锛堝钩鏂圭背锛夌瓟锛氳繖鏉℃按娉ヨ矾鐨勯潰绉槸28.26骞虫柟绫筹紟
绛旓細鎼滅储绛旀 鎴戣鎻愰棶 涓涓崐寰勪负8绫崇殑鍦嗗舰鑺卞潧,鍦瀹冨懆鍥閾鸿3绫崇殑姘存偿璺,姘存偿璺殑闈㈢Н鏄灏 鎴戞潵绛 棣栭〉 鐢ㄦ埛 璁よ瘉鐢ㄦ埛 瑙嗛浣滆 甯府鍥 璁よ瘉鍥㈤槦 鍚堜紮浜 浼佷笟 濯掍綋 鏀垮簻 鍏朵粬缁勭粐 鍟嗗煄 娉曞緥 鎵嬫満绛旈 鎴戠殑 涓涓崐寰勪负8绫崇殑鍦嗗舰鑺卞潧,鍦ㄥ畠鍛ㄥ洿閾鸿3绫崇殑姘存偿璺,姘存偿璺殑闈㈢Н鏄灏 ...
