Matlab三角形面积计算：已知三点坐标

"Matlab" "三角形" "面积" "计算" "已知" "三点" "坐标" "假设" "点" "A" "的" "坐标" "为" "(" "x1" "," "y1" ")," "点" "B" "的" "坐标" "为" "(" "x2" "," "y2" ")," "点" "C" "的" "坐标" "为" "(" "x3" "," "y3" ")." "可以使用" "以下" "公式" "求得" "三角形" "ABC" "的" "面积" ":" "\n" "面积" "=" "1/2" "" "|" "(" "x1" "" "(" "y2" "-" "y3" ")" "+" "x2" "" "(" "y3" "-" "y1" ")" "+" "x3" "" "(" "y1" "-" "y2" ")" "|" "\n" "\n" "下面" "是" "一个" "使用" "Matlab" "编写" "的" "求解" "三角形" "面积" "的" "代码" "示例" ":" "\n" "\n" "matlab\" \"\n\" \"%\" \"输入\" \"三个\" \"点\" \"的\" \"坐标\" \"\n\" \"x1\" \"=\" \"input\" \"(\" \"\'请输入点A的x坐标: \'\" \"\)\" \"\;\" \"\n\" \"y1\" \"=\" \"input\" \"(\" \"\'请输入点A的y坐标: \'\" \"\)\" \"\;\" \"\n\" \"x2\" \"=\" \"input\" \"(\" \"\'请输入点B的x坐标: \'\" \"\)\" \"\;\" \"\n\" \"y2\" \"=\" \"input\" \"(\" \"\'请输入点B的y坐标: \'\" \"\)\" \"\;\" \"\n\" \"x3\" \"=\" \"input\" \"(\" \"\'请输入点C的x坐标: \'\" \"\)\" \"\;\" \"\n\" \"y3\" \"=\" \"input\" \"(\" \"\'请输入点C的y坐标: \'\" \"\)\" \"\;\" \"\n\" \"\n\" \"%\" \"计算\" \"面积\" \"\n\" \"area\" \"=\" \"1/2\" \"*\" \"abs\" \"(\" \"x1\" \"*\" \"(\" \"y2\" \"-\" \"y3\" \"\)\" \"\+\" \"x2\" \"*\" \"(\" \"y3\" \"-\" \"y1\" \"\)\" \"\+\" \"x3\" \"*\" \"(\" \"y1\" \"-\" \"y2\" \"\)\" \"\)\" \"\;\" \"\n\" \"\n\" \"%\" \"输出\" \"结果\" \"\n\" \"fprintf\" \"(\" \"\'三角形ABC的面积为: %.2f\n\'\" \",\" \"area\" \"\)\" \"\;\" \"\n\" \"" "\n" "\n" "你可以" "将" "以上" "代码" "保存" "为" "一个" ".m" "文件"," "然后" "在" "Matlab" "命令" "窗口" "中" "运行"," "依次" "输入" "三个" "点" "的" "坐标"," "即可" "得到" "三角形" "ABC" "的" "面积" ".