(a) 7.5 cm + 3.5 cm > 5 cm
3.5 cm + 5 cm > 7.5 cm
5 cm + 7.5 cm > 3.5 cm
∴ Construction of triangle is possible.
(b) 4.3 cm + 3.7 cm = 8 cm.
∴ The construction of triangle is not possible.
(c) 3.5 cm + 2.7 cm < 6.5 cm
∴ The construction of triangle is not possible.