若一个圆的面积是314平方厘米，则圆的周长是 一个圆的面积是314平方厘米，它的周长是多少厘米？
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若一个圆的面积是314平方厘米，则圆的周长是__62.8___厘米。圆周长是（62.8）厘米
62.8厘米
35.5
62.8
绛旓細鍦嗗懆闀挎槸锛62.8锛鍘樼背
绛旓細鑻ヤ竴涓渾鐨勯潰绉槸314骞虫柟鍘樼背锛屽垯鍦嗙殑鍛ㄩ暱鏄痏_62.8___鍘樼背銆
绛旓細鐢辨鍙互姹傚嚭r2=闈㈢Н梅蟺=314梅3.14=100锛屽洜涓102=100锛屾墍浠ヨ繖涓渾鐨勫崐寰勬槸10鍘樼背锛屾嵁姝ゅ嵆鍙В绛旓紟 314梅3.14=100锛骞虫柟鍘樼背锛夛紝鍥犱负10脳10=100锛屾墍浠ヨ繖涓渾鐨勫崐寰勬槸10鍘樼背锛屽嵆1鍒嗙背锛庣瓟锛氳繖涓渾鐨勫崐寰勬槸1鍒嗙背锛庢晠閫夛細B锛 鐐硅瘎锛 姝ら鑰冩煡浜鍦嗙殑闈㈢Н鍏紡浠ュ強瀹屽叏骞虫柟鏁扮殑鎬ц川鐨勭伒娲诲簲鐢...
绛旓細314梅3.14=100锛骞虫柟鍘樼背锛夛紝鍥犱负10脳10=100锛屾墍浠ヨ繖涓渾鐨勫崐寰勬槸10鍘樼背锛屽嵆1鍒嗙背锛庣瓟锛氳繖涓渾鐨勫崐寰勬槸1鍒嗙背锛庢晠閫夛細B锛
绛旓細314梅3.14=100 100=10鐨勫钩鏂 鍒欏崐寰勪负10鍘樼背 鐩村緞涓10*2=20 鍛ㄩ暱=20*3.14=62.8
绛旓細鍏堟牴鎹鍦嗙殑闈㈢Н鍏紡璁＄畻鍦嗙殑鍗婂緞锛屽崐寰=鏍瑰彿锛314/3.14锛=10鍘樼背銆傚啀鏍规嵁鍦嗙殑鍛ㄩ暱鍏紡璁＄畻鍦嗙殑鍛ㄩ暱锛屽懆闀=2脳3.14脳10=62.8鍘樼背銆
绛旓細闈㈢Н绠楀紡S锛澫r²3.14脳1²=3.14 3.14脳2²=12.56 3.14脳3²=28.26 3.14脳4²=50.24 3.14脳5²=78.5 3.14脳6²=113.04 3.14脳7²=153.86 3.14脳8²=200.96 3.14脳9²=254.34 3.14脳10²=314 3.14脳...
绛旓細涓涓渾鐨勯潰绉槸314骞虫柟鍘樼背,鍛ㄩ暱鏄( 62.8鍘樼背),鍗婂緞鏄( 10鍘樼背),鐩村緞鏄( 20鍘樼背)3.14脳鍗婂緞²=闈㈢Н锛涘崐寰=鈭100=10鍘樼背 鐩村緞=2脳鍗婂緞=20鍘樼背锛涘懆闀=3.14脳2脳鍗婂緞=62.8鍘樼背 鎮ㄥソ锛屽緢楂樺叴涓烘偍瑙ｇ瓟锛宻kyhunter002涓烘偍绛旂枒瑙ｆ儜 濡傛灉鏈鏈変粈涔堜笉鏄庣櫧鍙互杩介棶锛屽鏋滄弧鎰忚寰楅噰绾 濡傛灉鏈夊叾浠...
绛旓細r 2 =314梅3.14=100锛堝钩鏂圭背锛=10脳10 鎵浠ワ紝r=10 姝ｆ柟褰㈢殑瀵硅绾跨殑闀垮害鏄細10脳2=20锛堝帢绫筹級 姝ｆ柟褰鐨勯潰绉槸锛20脳20梅2=200锛骞虫柟鍘樼背锛 绛旓細鍦嗗唴鏈澶ф鏂瑰舰鐨勯潰绉槸200骞虫柟鍘樼背锛 鏁呴夛細A锛
绛旓細蟺r²=314锛屾墍浠ワ紝r=10锛岀洿寰刣=2r=20锛屽懆闀縇=2蟺r=31.4
