Author: rinden

(1) “Langley’s Problem,” “Regular Quadrilateral”

This is a tool that instantly calculates the angles for the "Langley Problem" and "Regular Quadrilateral."

(2) "The Langley B Problem"

"The Langley Type B Problem."

(3) "Right-angled triangle"

For the elementary geometry problem titled “Triangle with Integer Angles,” please search Google for “Biglobe Langley’s Problem” and refer to the “Math and Gauss” section on the top page.