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discuss how a builder could use Pythagoras to measure right angles in a building

 Feb 23, 2015

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 #1
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One way is known as the "carpenter's trick."

To find out if two walls are at right angles to each other, the carpenter marks a point on one of the walls 3 units from where the surfaces join. On the other wall, at the same height, he marks a point 4 units from where the walls join.Then, he measures the distance between the points. If this = 5 units, the walls are at right angles.

This "works" brcause of the Pythagorean "Triple,"   3 - 4  - 5

 

 Feb 23, 2015
 #1
avatar+130516 
+5
Best Answer

One way is known as the "carpenter's trick."

To find out if two walls are at right angles to each other, the carpenter marks a point on one of the walls 3 units from where the surfaces join. On the other wall, at the same height, he marks a point 4 units from where the walls join.Then, he measures the distance between the points. If this = 5 units, the walls are at right angles.

This "works" brcause of the Pythagorean "Triple,"   3 - 4  - 5

 

CPhill Feb 23, 2015

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