把一个长3厘米宽1.5厘米的长方形分成4个三角形,通过怎样的变换可拼成一个正方形 把一个长3厘米,宽1.5厘米的长方形怎么分成一个长方形和一个...
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绛旓細300鍘樼背绛変簬3绫筹紝150鍘樼背绛変簬1.5绫炽傞偅灏辨槸3x1.5=4.5骞崇背
绛旓細浜屻傚厛姹備竴涓渾鐨勫懆闀匡紝鍐嶉櫎浠2锛屽啀鍔犵洿寰 2脳3.14脳4=25.12鍘樼背 25.12梅2=12.56鍘樼背 12.56+4=16.56鍘樼背,2,鐢涓寮犻暱5鍘樼背,瀹3鍘樼背鐨勯暱鏂瑰舰鍓竴涓渶澶х殑鍦.鐢ㄤ竴寮犻暱5鍘樼背,瀹3鍘樼背鐨勯暱鏂瑰舰鍓竴涓渶澶х殑鍦,杩欎釜鍦嗙殑鍗婂緞鏄嚑鍘樼背,鍛ㄩ暱鏄嚑鍘樼背?涓涓渾鐨勭洿寰勬槸4鍘樼背,鎶婂畠鍒嗘垚涓や釜...
绛旓細鏂板浘褰㈢殑闈㈢Н=锛3/2锛*锛2/2锛=1.5脳1=1.5cm²
绛旓細澧炲姞鐨勪袱涓潰鏄師闀挎柟浣撶殑涓や釜鏈澶ч潰锛氶暱7鍘樼背锛岄珮3鍘樼背鐨闈紝鎵浠ュ钩琛岀潃杩欎釜闈㈠垏锛7脳3脳2=42锛堝钩鏂瑰帢绫筹級锛岀瓟锛氬钩琛岀潃闀7鍘樼背锛岄珮3鍘樼背鐨勯潰鍒囷紝琛ㄩ潰绉渶澶氬鍔42骞虫柟鍘樼背锛
绛旓細棰樼洰搴旇鏄細涓涓暱鏂瑰舰闀挎槸瀹界殑1.5鍊,鍛ㄩ暱鏄15鍘樼背,閭ｄ箞,杩欎釜闀挎柟褰㈢殑闈㈢Н鏄灏戝钩鏂瑰帢绫 闀挎柟褰㈢殑瀹芥槸 15梅2梅锕1锛1.5锕氾紳3鍘樼背 闀挎柟褰鐨勯暱鏄 3鍘樼背脳1.5锛4.5鍘樼背 闀挎柟褰㈢殑闈㈢Н鏄 4.5脳3锛13.5骞虫柟鍘樼背
绛旓細闀挎柟浣撲綋绉=闀棵楀脳楂 15鍘樼背=1.5鍒嗙背 闀挎柟浣撲綋绉槸锛5脳1.5脳3=22.5绔嬫柟鍒嗙背
绛旓細澧炲姞鐨勯潰绉负鍒囧彛澶勭殑涓や釜闈 瑕佹兂闈㈢Н澧炲姞鏈澶э紝鍒欏鍔犵殑闈㈢殑涓よ竟涓笉鑳芥湁鏈灏忚竟 7脳3 > 7脳1.5 > 3脳1.5 鎵浠ュ鍔犳渶澶氭椂澧炲姞鐨勪负7鍘樼背涓3鍘樼背鐨闈 鎵浠ュ鍔犻潰绉=2脳7脳3=42 骞虫柟鍘樼背
绛旓細5銆佸皬绾㈡妸鍘嬪瞾閽1000鍏冨瓨鍏ラ摱琛,瀹氭湡3骞,骞村埄鐜囨槸2.25%銆傚埌鏈熸椂灏忕孩鍙幏寰楁湰閲戝拰绋庡悗鍒╂伅涓鍏辨槸( )鍏冦 6銆涓涓暱鏂瑰舰,瀹冪殑瀹芥槸闀跨殑 銆傚鏋滃澧炲姞12鍘樼背,閭ｄ箞闀挎柟褰㈠氨鍙樻垚浜嗕竴涓鏂瑰舰銆傚師鏉ラ暱鏂瑰舰闈㈢Н鏄( )骞虫柟鍘樼背銆 7銆佷竴涓渾鏌卞拰涓涓渾閿ョ殑搴曢潰鍗婂緞鍜屼綋绉垎鍒浉绛,鍦嗛敟鐨勯珮1.5鍒嗙背,鍦嗘煴鐨勯珮鏄( )...
绛旓細鍦涓涓暱3鍘樼背銆佸2鍘樼背鐨勯暱鏂瑰舰鍐呭壀涓嬩竴涓渶澶х殑鍦嗭紝杩欎釜鍦嗙殑鍛ㄩ暱鏄( 6.28鍘樼背),闈㈢Н鏄紙 3.14骞虫柟鍘樼背),鍓╀笅鍥惧舰鐨勯潰绉槸锛2.86骞虫柟鍘樼背)瑙ｏ細2*3.14=6.28鍘樼背 锛2/2锛2*3.14=3.14骞虫柟鍘樼背 3*2-3.14=2.86骞虫柟鍘樼背 ...
绛旓細5銆佸皬绾㈡妸鍘嬪瞾閽1000鍏冨瓨鍏ラ摱琛,瀹氭湡3骞,骞村埄鐜囨槸2.25%銆傚埌鏈熸椂灏忕孩鍙幏寰楁湰閲戝拰绋庡悗鍒╂伅涓鍏辨槸( )鍏冦 6銆涓涓暱鏂瑰舰,瀹冪殑瀹芥槸闀跨殑 銆傚鏋滃澧炲姞12鍘樼背,閭ｄ箞闀挎柟褰㈠氨鍙樻垚浜嗕竴涓鏂瑰舰銆傚師鏉ラ暱鏂瑰舰闈㈢Н鏄( )骞虫柟鍘樼背銆 7銆佷竴涓渾鏌卞拰涓涓渾閿ョ殑搴曢潰鍗婂緞鍜屼綋绉垎鍒浉绛,鍦嗛敟鐨勯珮1.5鍒嗙背,鍦嗘煴鐨勯珮鏄( )...
