please dont copy anyones answer I have already looked
at them all
2. Recall (Exercise 3.2.8)...
2. Recall (Exercise 3.2.8) that the square metric distance between two points (x1, y) and (x2, y2) in R2 is given by D((x1, yı), (x2, y2)) = max{\x2 - xil, ly2 - yıl}. Show by example that R2 with the square metric and the usual angle measurement function does not satisfy the SAS Postulate.