Excellent tut once I figured out she was using the markings on the cutting mat and not the ruler. Probably obvious to everyone but me but just in case . saved me a bunch of time and money not looking for a triangle ruler !
To use: make a hexagon, the corners of a square, vertical line or an isosceles triangle to find the “best” colors to coordinate with a particular kimono color, according to the traditional Japanese schools of color.
Writing congruency statements- Using Triangle Sum Theorem- Identifying corresponding parts of triangles- Using base angles of isosceles triangles- Setting up and solving linear equations to find missing angle measur.
Isosceles triangle/Delta Tattoo Desing - Symbol for change, because it is the first letter for the Greek word meaning different. It denotes a gene deletion in genetics and is the fourth letter in the Greek alphabet.