The scale factor of 4 was applied to the first triangle. 6 was divided by 4 to get 1.5
3/8 because there are 3 green and in total there are 8 sections
multiply 4 by the cos(45)
4 x cos(45) = 2sqrt(2) approximately 2.828cm
so depending how you are supposed to answer, either 2 sqrt(2) or approximately 2.83 cm
