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I guarantee the walls are not parallel but you may not notice it. Point is being off a 1/4" or so in any direction for something like that is not going to be a problem. Just measure up, and measure over from the nearest wall on each side. Probably be more accurate that way than a level if you are not used to using a level. We'd just shoot our laser on it ...


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Why not buy the pipe, and make the marks based on that. That is, have a level, hold the pipe up and level it, then mark where it touches the wall. A friend would help, so might hanging or otherwise supporting the pipe from either above or below as you do this.


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Nobody uses fractions in the USA for small measurements, either. Typical machinist measurements are in thousandths or ten thousandths of an inch. ) Engineers and surveyors often use feet and tenth of a foot. Even carpenters don't always use standard fractional inches. A framing square has rules divided in 16ths, 8ths, 10ths, and 12ths. Use the most ...


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It's Easy. Let's consider the height of the tree is x. Measure the shadow length of x. Take a Stick and measure it's height. Measure it's shadow too. Let's say stick is "y" tall and it's shadow is "b" long. Do the proportion. y:b::x:a. We need to find x. Do Y*A. Divide thaat answer with b. That answer is x and therefore it is the height of the tree.



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