正方形的周长是9.2米,边长是多少?面积是多少? 一个正方形边长30米,面积和周长各是多少
\u4e00\u4e2a\u6b63\u65b9\u5f62\u82b1\u6c60\u7684\u8fb9\u957f\u662f9.2\u7c73\uff0c\u5b83\u7684\u5468\u957f\u548c\u9762\u79ef\u5404\u662f\u591a\u5c11\uff1f\u5468\u957f\uff1a9.24=36.8\uff08\u7c73\uff09\u9762\u79ef\uff1a9.2\u00d79.2=84.64\uff08\u5e73\u65b9\u7c73\uff09
\u9762\u79ef\uff1a30\u00d730\uff1d900\uff08\u5e73\u65b9\u7c73\uff09
\u5468\u957f\uff1a30\u00d74\uff1d120\uff08\u7c73\uff09
\u7b54\uff1a\u9762\u79ef\u662f900\u5e73\u65b9\u7c73\uff0c\u5468\u957f\u662f120\u7c73\u3002
边长是2.3面积是5.29
边长=9.2÷4=2.3
绛旓細杈归暱:9.2闄や簬4寰楄竟闀 杈归暱x杈归暱寰楅潰绉
绛旓細瑙o細宸茬煡姝f柟褰㈣彍鍦扮殑鍛ㄩ暱鏄9.2绫炽杈归暱=鍛ㄩ暱梅4 =9.2梅4 =2.3绫 闈㈢Н=杈归暱脳杈归暱 =2.3脳2.3 =5.29骞虫柟绫 绛旓細姝f柟褰㈢殑杈归暱鏄2.3绫筹紝闈㈢Н鏄5.29骞虫柟绫炽
绛旓細杈归暱=鍛ㄩ暱梅4=9.2梅4=2.3(绫)鏉庣孩鐨勫井淇¢挶鍖呬腑鏈45.6鍏锛屽垰濂借兘涔颁笁鏈晠浜嬩功锛屾瘡鏈晠浜嬩功澶氬皯閽憋紵45.6梅3=15.2(鍏)姣忔湰鏁呬簨涔15.2鍏冦
绛旓細9.48梅4=2.37锛堢背锛锛岀瓟锛氳繖涓鏂瑰舰鐨勮竟闀挎槸2.37绫筹紟鏁呯瓟妗堜负锛2.37锛
绛旓細瑙:渚濇嵁棰樻剰鏈,杈归暱=4/4=1(绫)=10鍒嗙背 鎵浠,姝f柟褰㈢殑杈归暱鏄(10)鍒嗙背.
绛旓細72梅4=18锛堢背锛夌瓟锛氬畠鐨杈归暱鏄18绫筹紟鏁呴夛細A锛
绛旓細9.2/2-1,5=3.1
绛旓細涓涓姝f柟褰㈢殑鍛ㄩ暱鏄7绫筹紝杈归暱鏄1.75绫 7梅4=1.75绫
绛旓細涓涓姝f柟褰㈢殑鍛ㄩ暱涓a绫筹紝瀹冪殑杈归暱鏄锛坅/4锛夛紝褰 a绛変簬2.4鏃讹紝杩欎釜姝f柟褰㈢殑杈归暱鏄(0.6)绫
绛旓細瑙o細宸茬煡涓涓姝f柟褰㈢殑鍛ㄩ暱鏄60绫筹紝涓旀鏂瑰舰鐨勫懆闀=杈归暱脳4锛屽緱杈归暱脳4=60 杈归暱=60梅4 杈归暱=15绫 绛旓細涓涓鏂瑰舰鐨勫懆闀挎槸60绫筹紝杈归暱鏄15绫炽