有一半圆,直径AB=10,圆点为D,现于(与B同侧的)半圆外取一点C形成三角形BCD,CD与半圆的交点为E,已知面积 ADE-BCE=18.25,求CD长?我也是求出BCD面积后卡住了,三楼能否给接着用中学知识解下呢,
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![有一半圆,直径AB=10,圆点为D,现于(与B同侧的)半圆外取一点C形成三角形BCD,CD与半圆的交点为E,已知面积 ADE-BCE=18.25,求CD长?我也是求出BCD面积后卡住了,三楼能否给接着用中学知识解下呢,](/uploads/image/z/1690582-22-2.jpg?t=%E6%9C%89%E4%B8%80%E5%8D%8A%E5%9C%86%2C%E7%9B%B4%E5%BE%84AB%3D10%2C%E5%9C%86%E7%82%B9%E4%B8%BAD%2C%E7%8E%B0%E4%BA%8E%EF%BC%88%E4%B8%8EB%E5%90%8C%E4%BE%A7%E7%9A%84%EF%BC%89%E5%8D%8A%E5%9C%86%E5%A4%96%E5%8F%96%E4%B8%80%E7%82%B9C%E5%BD%A2%E6%88%90%E4%B8%89%E8%A7%92%E5%BD%A2BCD%2CCD%E4%B8%8E%E5%8D%8A%E5%9C%86%E7%9A%84%E4%BA%A4%E7%82%B9%E4%B8%BAE%2C%E5%B7%B2%E7%9F%A5%E9%9D%A2%E7%A7%AF+ADE-BCE%3D18.25%2C%E6%B1%82CD%E9%95%BF%3F%E6%88%91%E4%B9%9F%E6%98%AF%E6%B1%82%E5%87%BABCD%E9%9D%A2%E7%A7%AF%E5%90%8E%E5%8D%A1%E4%BD%8F%E4%BA%86%EF%BC%8C%E4%B8%89%E6%A5%BC%E8%83%BD%E5%90%A6%E7%BB%99%E6%8E%A5%E7%9D%80%E7%94%A8%E4%B8%AD%E5%AD%A6%E7%9F%A5%E8%AF%86%E8%A7%A3%E4%B8%8B%E5%91%A2%EF%BC%8C)
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