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Estimating the Length of a Bridge When crossing a river, it is often necessary to build a bridge. The length of the bridge will depend on the width of the river and the height of the banks. To estimate the length of the bridge, you can use the following steps: 1. Measure the width of the river. 2. Determine the height of the banks. 3. Calculate the hypotenuse of the triangle formed by the river and the banks. 4. Add the length of the bridge supports to the hypotenuse to get the total length of the bridge. For example, if the river is 100 feet wide and the banks are 50 feet high, the hypotenuse of the triangle will be 100 √2 = 141.42 feet. If the bridge supports are 10 feet long, the total length of the bridge will be 141.42 + 10 = 151.42 feet.
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