# Triangulation

*Why dimension in triangles? The Cartesian coordinate system of X and Y values are easier to understand.*

#### While they’re easy to understand, they’re hard to use to draw something as big as our sundial. Triangulation is much more accurate for drawing larger scale items.

When a carpenter sets out where to place the walls of a house, he will draw a right angle triangle that have sides of 3 x 4 x 5. This triangle can be any size as long as the proportions remain the same.

#### A layout triangle to obtain squareness can be

3ft x 4ft x 5ft

30in x 40in x 50in

3 meters x 4 meters x 5 meters

30ft x 40ft x 50ft

#### The sundial is set-out by using the same method.

#### All dimensions of the sundial are referenced from four set-out marks.

#### The triangle dimensions are given to you in an easy to follow format. These dimensions are in both inches and millimeters.

#### The marking of the hour points can be checked by using the Cartesian coordinate system (X and Y values)

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