锐角三角形ABC中,sinA=√5/5,D为BC边上的点,若△ABD 和△ACD的面积分别为2和4,过D作DE ⊥AB于E,DF⊥AC于F,

作者: tihaiku 人气: - 评论: 0
问题 锐角三角形ABC中,sinA=√5/5,D为BC边上的点,若△ABD 和△ACD的面积分别为2和4,过D作DE ⊥AB于E,DF⊥AC于F,
选项
答案
解析

相关内容:锐角,三角形,面积

猜你喜欢

更多 网友评论0 条评论)
暂无评论
错误啦!

错误信息

  • 消息: [程序异常] : MISCONF Redis is configured to save RDB snapshots, but it's currently unable to persist to disk. Commands that may modify the data set are disabled, because this instance is configured to report errors during writes if RDB snapshotting fails (stop-writes-on-bgsave-error option). Please check the Redis logs for details about the RDB error.
  • 文件: /twcms/kongphp/cache/cache_redis.class.php
  • 位置: 第 85 行
    <?php echo 'KongPHP, Road to Jane.'; ?>