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Two men, starting at the same point, walk in opposite directions for 4 meters, turn left and walk another 3 meters. What is the distance between them?
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解析：
两人的路线可看作两个直角边边长为3米和4米的直角三角形，这时他们之间的距离是两个三角形斜边之和，由斜边边长的平方等于两条直角边边长平方之和可求出距离为10米。
两人的路线可看作两个直角边边长为3米和4米的直角三角形，这时他们之间的距离是两个三角形斜边之和，由斜边边长的平方等于两条直角边边长平方之和可求出距离为10米。
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