画一个面积是8平方厘米的梯形咋画 怎么画一个面积是8平方分米的梯形 怎么画
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绛旓細鍥犱负骞宠鍥涜竟褰㈢殑闈㈢Н鏄8骞虫柟鍘樼背锛屼笁瑙掑舰鐨勯潰绉槸6骞虫柟鍘樼背锛姊舰鐨闈㈢Н鏄12骞虫柟鍘樼背锛屾墍浠ュ钩琛屽洓杈瑰舰鐨勫簳鍜岄珮鍒嗗埆涓4鍘樼背鍜2鍘樼背锛涗笁瑙掑舰鐨勫簳鍜岄珮鍒嗗埆涓4鍘樼背鍜3鍘樼背锛涙褰㈢殑涓婂簳銆佷笅搴曞拰楂樺垎鍒负3鍘樼背銆5鍘樼背鎴 3鍘樼背锛屾嵁姝ょ敾鍥惧舰濡備笅锛
绛旓細搴旇鏄8骞虫柟鍘樼背銆傛湁濂藉鏂规硶锛氾紙1锛変笂搴1cm锛屼笅搴3cm锛岄珮4cm锛孲=锛1+3锛壝4梅2=8锛坈m²锛夛紙2)涓婂簳2cm锛屼笅搴6cm锛岄珮2cm锛孲=锛2+6锛壝2梅2=8锛坈m²锛夈
绛旓細鍥犱负S骞宠鍥涜竟褰=S姊舰=8骞虫柟鍘樼背锛屽钩琛屽洓杈瑰舰鐨勫簳鍜岄珮鍙互涓4鍘樼背鍜2鍘樼背锛屾褰㈢殑涓婂簳銆佷笅搴曞拰楂樺彲浠ヤ负5鍘樼背銆3鍘樼背鍜2鍘樼背锛屼簬鏄墍鐢诲浘褰㈠涓嬪浘鎵绀猴細
绛旓細2.鐢诲嚭闈㈢Н鏄8骞虫柟鍘樼背鐨骞宠鍥涜竟褰6骞虫柟鍘樼背鐨勪笁瑙掑舰鍜12骞虫柟鍘樼背鐨勬褰鍚涓涓銆(姣忎釜灏忔柟鏍艰〃 2.鐢诲嚭闈㈢Н鏄8骞虫柟鍘樼背鐨勫钩琛屽洓杈瑰舰銆6骞虫柟鍘樼背鐨勪笁瑙掑舰鍜12骞虫柟鍘樼背鐨勬褰㈠悇涓涓(姣忎釜灏忔柟鏍艰〃1骞虫柟鍘樼背)... 2.鐢诲嚭闈㈢Н鏄8骞虫柟鍘樼背鐨勫钩琛屽洓杈瑰舰銆6骞虫柟鍘樼背鐨勪笁瑙掑舰鍜12骞虫柟鍘樼背鐨勬褰㈠悇涓涓(姣忎釜...
绛旓細鍥犱负骞宠鍥涜竟褰㈢殑闈㈢Н鏄8骞虫柟鍘樼背锛屼笁瑙掑舰鐨勯潰绉槸6骞虫柟鍘樼背锛姊舰鐨闈㈢Н鏄12骞虫柟鍘樼背锛屾墍浠ュ钩琛屽洓杈瑰舰鐨勫簳鍜岄珮鍒嗗埆涓4鍘樼背鍜2鍘樼背锛涗笁瑙掑舰鐨勫簳鍜岄珮鍒嗗埆涓4鍘樼背鍜3鍘樼背锛涙褰㈢殑涓婂簳銆佷笅搴曞拰楂樺垎鍒负3鍘樼背銆5鍘樼背鎴 3鍘樼背锛屾嵁姝ょ敾鍥惧舰濡備笅锛氾紟
绛旓細涓涓褰㈢殑闈㈢Н鏄8骞虫柟鍘樼背锛屽鏋滃畠鐨勪笂搴曚笅搴曪紝鍜岄珮锛屽悇鎵╁ぇ涓ゅ嶅畠鐨勯潰绉墿澶4鍊=32鍘樼背
绛旓細锛1锛鐢讳竴涓涓庡凡鐭ョ殑涓夎褰㈢瓑搴曠瓑楂樼殑骞宠鍥涜竟褰紝鍒欏钩琛屽洓杈瑰舰鐨勯潰绉氨鏄繖涓笁瑙掑舰鐨闈㈢Н鐨2鍊嶏細锛2锛夊洜涓篠骞宠鍥涜竟褰=S涓夎褰=12骞虫柟鍘樼背锛屽垯骞宠鍥涜竟褰㈢殑搴曞拰楂樺彲浠ヤ负4鍘樼背鍜3鍘樼背锛屼笁瑙掑舰鐨勫簳鍜岄珮鍙互涓6鍘樼背鍜4鍘樼背锛屽洜涓姊舰鐨勯潰绉=8骞虫柟鍘樼背锛屾墍浠ユ褰㈢殑涓婂簳銆佷笅搴曞拰楂樺彲浠ヤ负3鍘樼背銆5...
绛旓細浣犵粍鍚堜竴涓嬶紝寰堝鐨勭瓟妗堢殑銆傘傘
绛旓細濡傚浘锛岃繃鐐笴鍋欳F鈭B浜D鐨勫欢闀跨嚎浜庣偣F,杩囩偣C鍋欳E鈯F 鍒欏洓杈瑰舰BCFD鏄钩琛屽洓杈瑰舰 鈭碆D=CF 鈭碅C=CF,鈭碋鏄疉F鐨勪腑鐐 鈭礎F=AD+DF=AD+BC=8 鈭碊E=x=2 鈭姊舰鐨勯潰绉=8 鈭碈E=2 鈭碊E=CE 鈭粹柍CDE鏄瓑鑵扮洿瑙掍笁瑙掑舰 鈭粹垹CDE=45º鈭存褰㈣緝澶х殑搴曡=180º-45º=135º...
绛旓細缁樺浘濡備笅鍥撅細鍦ㄨВ鍐崇被浼艰繖绉嶉棶棰樼殑鏃跺欙紝鏂规硶鍙互鎸夌収涓嬫枃璁茶堪鏉ュ紑鎷撴濊矾銆備富瑕佹槸瑕佹壘鍒拌В鍐抽棶棰樼殑瑙勫緥銆闈㈢Н鏄16骞虫柟鍘樼背鐨勫钩琛屽洓杈瑰舰銆傚涓嬪浘锛氶潰绉槸16骞虫柟鍘樼背鐨勪笁瑙掑舰銆傚涓嬪浘锛氶潰绉槸16骞虫柟鍘樼背鐨勬褰銆傚涓嬪浘锛氬彧缁欏嚭浜嗘棦瀹氱殑闈㈢Н瑕佹眰锛屽垯涓昏鏄湪浜庡鍚勪釜鍥惧舰闈㈢Н璁＄畻鍏紡鐨勮冩牳銆傚彧瑕佽兘澶熸帉鎻″浘褰...
