求份初中数学听课评课记录：SAS、 求份初中数学听课评课记录：三角形中位线、
\u6c42\u51e0\u4efd\u521d\u4e2d\u6570\u5b66\u542c\u8bfe\u8bc4\u8bfe\u8bb0\u5f55\u6211\u53ef\u4ee5\u7ed9\u4f60\u63d0\u4f9b\u4e00\u4e2a\u529e\u6cd5 \u6574\u7406\u8fd9\u4e9b\u771f\u7684\u5f88\u9ebb\u70e6 \u800c\u4e14\u4e5f\u4e0d\u5bb9\u6613\u5f04\u5230\u7535\u8111\u4e0a \u60f3\u4f60\u9644\u8fd1\u7684\u6bd5\u4e1a\u7684\u521d\u4e2d\u751f\u501f\u4e00\u672c\u53eb\u505a\u6570\u5b66\u603b\u590d\u4e60 \u90a3\u91cc\u9762\u5305\u62ec\u521d\u4e2d\u4e09\u5e74\u7684\u6240\u6709\u77e5\u8bc6 \u662f\u84dd\u8272\u7684\u4e00\u672c \u6211\u73b0\u5728\u521a\u521a\u6bd5\u4e1a \u624d\u6df1\u77e5\u90a3\u4e2a\u7279\u522b\u7ba1\u7528 \u8bed\u6587 \u82f1\u8bed ...\u90fd\u6709\u7684 \u4f60\u53ef\u4ee5\u770b\u770b \u5e94\u8be5\u53ef\u4ee5\u6ee1\u8db3\u4f60\u7684\u9700\u6c42
\u5b9a\u4e49 \u4e09\u89d2\u5f62\u4e2d\u4f4d\u7ebf\u5b9a\u4e49\uff1a\u8fde\u63a5\u4e09\u89d2\u5f62\u4e24\u8fb9\u4e2d\u70b9\u7684\u7ebf\u6bb5\u53eb\u505a\u4e09\u89d2\u5f62\u7684\u4e2d\u4f4d\u7ebf\uff0e
\u89d2\u5f62\u4e2d\u4f4d\u7ebf\u6027\u8d28\uff1a\u4e09\u89d2\u5f62\u7684\u4e2d\u4f4d\u7ebf\u5e73\u884c\u4e8e\u7b2c\u4e09\u8fb9\u5e76\u4e14\u7b49\u4e8e\u5b83\u7684\u4e00\u534a\uff0e \u3000\u3000\u4e09\u89d2\u5f62\u4e09\u6761\u4e2d\u4f4d\u7ebf\u6240\u6784\u6210\u7684\u4e09\u89d2\u5f62\u662f\u539f\u4e09\u89d2\u5f62\u7684\u76f8\u4f3c\u5f62\u3002
\u8981\u628a\u4e09\u89d2\u5f62\u7684\u4e2d\u4f4d\u7ebf\u4e0e\u4e09\u89d2\u5f62\u7684\u4e2d\u7ebf\u533a\u5206\u5f00\uff0e\u4e09\u89d2\u5f62\u4e2d\u7ebf\u662f\u8fde\u7ed3\u4e00\u9876\u70b9\u548c\u5b83\u5bf9\u8fb9\u7684\u4e2d\u70b9\uff0c\u800c\u4e09\u89d2\u5f62\u4e2d\u4f4d\u7ebf\u662f\u8fde\u7ed3\u4e09\u89d2\u5f62\u4e24\u8fb9\u4e2d\u70b9\u7684\u7ebf\u6bb5
\u4e09\u89d2\u5f62\u4e2d\u4f4d\u7ebf\u5b9a\u7406\u7684\u9006\u5b9a\u7406
\u3000\u3000\u9006\u5b9a\u7406\u4e00\uff1a \u3000\u3000\u5982\u56feDE//BC\uff0cDE=BC/2\uff0c\u5219D\u662fAB\u7684\u4e2d\u70b9\uff0cE\u662fAC\u7684\u4e2d\u70b9\u3002 \u3000\u3000\u9006\u5b9a\u7406\u4e8c\uff1a \u3000\u3000\u5982\u56feD\u662fAB\u7684\u4e2d\u70b9\uff0cDE//BC\uff0c\u5219E\u662fAC\u7684\u4e2d\u70b9\uff0cDE=BC/2 \u3000\u3000\u3010\u8bc1\u6cd5\u2460\u3011 \u3000\u3000\u53d6AC\u4e2d\u70b9G \uff0c\u8054\u7ed3DG \u3000\u3000\u5219DG\u662f\u4e09\u89d2\u5f62ABC\u7684\u4e2d\u4f4d\u7ebf \u3000\u3000\u2234DG\u2225BC \u3000\u3000\u53c8\u2235DE\u2225BC \u3000\u3000\u2234DG\u548cDE\u91cd\u5408\uff08\u8fc7\u76f4\u7ebf\u5916\u4e00\u70b9\uff0c\u6709\u4e14\u53ea\u6709\u4e00\u6761\u76f4\u7ebf\u4e0e\u5df2\u77e5\u76f4\u7ebf\u91cd\u5408\uff09
Side-Side-Side (SSS) - if 3 sides of one triangle are congruent to 3 sides of another then triangles are congruent
Side-Angle-Side (SAS) - if two sides and the included triangle of on triangle are congruent to two sides and the included triangle of another, then triangles are congruent
SAS是什么呀？
绛旓細鍦鍚鏈熼棿,鎴戠湅鍒颁竴浜涙暀甯堣櫧鐒跺勾杞,缁忛獙涔熻涓嶅鑰佹暀甯堜赴瀵屾繁鍘,浣嗘槸鍦ㄤ笂璇剧殑鏃跺欏璇惧爞鐭ヨ瘑鐐圭殑璁捐姣旇緝鍚堢悊,鍦ㄥ鐢熼潰鍓嶈璇炬椂涔熸樉寰楁濊矾娓呮櫚銆佷簳浜曟湁鏉,鍙鍦ㄨ鍓嶅仛浜嗗厖鍒嗙殑鍑嗗銆 鏈鍚,鏁欏笀鑷韩鐨勮壇濂界礌璐ㄦ槸璁插ソ璇剧殑閲嶈鍓嶆彁鍜屽熀鏈繚璇併傚湪鍚涓垜鍙戠幇寰堝鑰佸笀閮芥湁鍑犱釜鍏卞悓鐗圭偣: 1銆佸彛璇祦鍒,鍙戦煶鍑嗙‘銆傚彧鏈夊仛...
