## Background

These equations assume that the corner reflector consists of three faces of equal size. Each face is a triangle with one 90 degree angle and two 135 degree angles. Given an inner length of $a$, the Pythagorean theorem is used to determine the length of an edge along the corner reflector's open face, $c = \sqrt{2}a$. WaveFarer defines a pyramid in terms of its radius and height, so these values' relationship to $a$ and $c$ must be determined.

## Pyramid Controls

Create a pyramid by right-clicking on Parts in the Project Tree, and selecting Create New ❯ Pyramid to open the pyramid editor.

Three of the editing fields should always use the following settings:

- Top: 0
- Sides: 3
- Create as: Sheet

The remaining fields can be specified as equations, such as in the following examples that assume the corner reflector has an inner edge length of 55 mm:

- Height: (55 mm) / sqrt(3)
- Radius 1: (55 mm) * sqrt(2/3)
- Radius 2: (55 mm) * sqrt(2/3)

A parameter can also be entered into the fields, such as in the following equations that use parameter innerLength set to 55 mm:

- Height: innerLength / sqrt(3)
- Radius 1: innerLength * sqrt(2/3)
- Radius 2: innerLength * sqrt(2/3)

Click Done to create a four-sided pyramid. Then right-click on Pyramid in the Project Tree and select Modify ❯ Remove Faces to create a three-sided corner reflector.