Could 2.8\text{ cm}, 4.0\text{ cm},2.8 cm,4.0 cm,2, point, 8, start text, space, c, m, end text, comma, 4, point, 0, start text, space, c, m, end text, comma and 2.8\text{ cm}2.8 cm2, point, 8, start text, space, c, m, end text be the side lengths of a triangle?