The perimeter of an isosceles triangle is 26 cm while equal

The perimeter of an isosceles triangle is 26 cm while equal sides together measure 20 cm. The third side and each of the equal sides are respectively.

1. 6 cm and 10 cm
2. 8 cm and 9 cm
3. 10 cm and 8 cm
4. 14 cm and 6 cm
5. None of the above

Let the third side be x.
According to the question,
x + 20 = 26
⇒ x = 26 - 20 = 6 cm
∴ Each equal side = 20/2 = 10 cm