1.水平地面上有一个球,用锐角45°的等腰直角三角板在斜边紧靠球面,P为切点,一条之辨AC紧靠地面,并使三角板与地面垂直,如果测得PA=5cm,则球的半径等于?
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![1.水平地面上有一个球,用锐角45°的等腰直角三角板在斜边紧靠球面,P为切点,一条之辨AC紧靠地面,并使三角板与地面垂直,如果测得PA=5cm,则球的半径等于?](/uploads/image/z/11619293-5-3.jpg?t=1.%E6%B0%B4%E5%B9%B3%E5%9C%B0%E9%9D%A2%E4%B8%8A%E6%9C%89%E4%B8%80%E4%B8%AA%E7%90%83%2C%E7%94%A8%E9%94%90%E8%A7%9245%C2%B0%E7%9A%84%E7%AD%89%E8%85%B0%E7%9B%B4%E8%A7%92%E4%B8%89%E8%A7%92%E6%9D%BF%E5%9C%A8%E6%96%9C%E8%BE%B9%E7%B4%A7%E9%9D%A0%E7%90%83%E9%9D%A2%2CP%E4%B8%BA%E5%88%87%E7%82%B9%2C%E4%B8%80%E6%9D%A1%E4%B9%8B%E8%BE%A8AC%E7%B4%A7%E9%9D%A0%E5%9C%B0%E9%9D%A2%2C%E5%B9%B6%E4%BD%BF%E4%B8%89%E8%A7%92%E6%9D%BF%E4%B8%8E%E5%9C%B0%E9%9D%A2%E5%9E%82%E7%9B%B4%2C%E5%A6%82%E6%9E%9C%E6%B5%8B%E5%BE%97PA%3D5cm%2C%E5%88%99%E7%90%83%E7%9A%84%E5%8D%8A%E5%BE%84%E7%AD%89%E4%BA%8E%3F)
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