6.3.2角的比较与运算 同步练(含答案） 2025-2026学年数学七年级上册人教版（2024）

6．3.2　角的比较与运算 eq \o(\s\up7( INCLUDEPICTURE "知识梳理.tif" INCLUDEPICTURE "../../../../广东慧源同步上册/广东慧源七年级上册数学/知识梳理.tif" \* MERGEFORMAT INCLUDEPICTURE "../../知识梳理.tif" \* MERGEFORMAT INCLUDEPICTURE "../../知识梳理.tif" \* MERGEFORMAT INCLUDEPICTURE "../知识梳理.tif" \* MERGEFORMAT INCLUDEPICTURE "知识梳理.tif" \* MERGEFORMAT ),\s\do5(　　　　　　　)) 知识点一　角的大小比较 1．角的大小比较与线段长短的比较类似，方法有两种． 方法1：度量法：直接用量角器度量比较． 注意：角的大小只与角两边的张开程度有关，与两边的长度无关． 方法2：叠合法：把两个角的顶点和一边重合，两个角的另一边放在重合边的同一侧，离重合边越远角度越大，反之越小． 如比较图中角的大小(图1、图2、图3). INCLUDEPICTURE "../../../../广东慧源同步上册/广东慧源七年级上册数学/SX198.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX198.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX198.tif" \* MERGEFORMAT INCLUDEPICTURE "../SX198.tif" \* MERGEFORMAT INCLUDEPICTURE "SX198.tif" \* MERGEFORMAT 图1 ∠AOB＜∠A′O′B′ INCLUDEPICTURE "../../../../广东慧源同步上册/广东慧源七年级上册数学/SX198A.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX198A.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX198A.tif" \* MERGEFORMAT INCLUDEPICTURE "../SX198A.tif" \* MERGEFORMAT INCLUDEPICTURE "SX198A.tif" \* MERGEFORMAT 图2 ∠AOB＝∠A′O′B′ INCLUDEPICTURE "../../../../广东慧源同步上册/广东慧源七年级上册数学/SX198B.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX198B.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX198B.tif" \* MERGEFORMAT INCLUDEPICTURE "../SX198B.tif" \* MERGEFORMAT INCLUDEPICTURE "SX198B.tif" \* MERGEFORMAT 图3 ∠AOB＞∠A′O′B′ 练习1　用“叠合法”比较∠1与∠2的大小，正确的是(　C　). eq \o(\s\up7( INCLUDEPICTURE "../../../../广东慧源同步上册/广东慧源七年级上册数学/SX199.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX199.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX199.tif" \* MERGEFORMAT INCLUDEPICTURE "../SX199.tif" \* MERGEFORMAT INCLUDEPICTURE "SX199.tif" \* MERGEFORMAT ),\s\do5(A)) 　 eq \o(\s\up7( INCLUDEPICTURE "../../../../广东慧源同步上册/广东慧源七年级上册数学/SX199A.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX199A.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX199A.tif" \* MERGEFORMAT INCLUDEPICTURE "../SX199A.tif" \* MERGEFORMAT INCLUDEPICTURE "SX199A.tif" \* MERGEFORMAT ),\s\do5(B)) 　 eq \o(\s\up7( INCLUDEPICTURE "../../../../广东慧源同步上册/广东慧源七年级上册数学/SX199b.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX199b.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX199b.tif" \* MERGEFORMAT INCLUDEPICTURE "../SX199b.tif" \* MERGEFORMAT INCLUDEPICTURE "SX199b.tif" \* MERGEFORMAT ),\s\do5(C)) 　 eq \o(\s\up7( INCLUDEPICTURE "../../../../广东慧源同步上册/广东慧源七年级上册数学/SX199C.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX199C.tif" \* MERGEFORMAT INCLUDEPICTURE "../../SX199C.tif" \* MERGEFORMAT INCLUDEPICTURE "../SX199C.tif" \* MERGEFORMAT INCLUDEPICTURE "SX199C.tif" \* MERGEFORMAT ),\s\do5(D)) 【解析】根据“叠合法”比较∠1与∠2的大小，需∠1和∠2的顶点及其中一边重合，并且另一边在重合边的同 ... ...