ⴰⵙⵏⴼⵍ ⵏ 4y2 ⵖⵔ c2, ⴳ ⵜⴳⴰⴷⴰⵣⵜ ⵜⴰⵎⵣⵡⴰⵔⵓⵜ (c2 = 2b2), ⴰⵖ ⵢⴰⴽⴽⴰⵏ 4y2= 2b2.