Atriangle with two congruent sides is always a( triangle.
a. right
b. scalene
c. isosceles
d. equilateral

Scalene triangle → Different length, therefore no congurent sides.
Isosceles triangle → Same length, therefore it has two congurent sides.
Equilateral triangle → All length are comparable, it has three congurent sides.
Right triangle → Measures 90°, in some cases, it has two congurent sides.

Congurent defination → Same shape and same size.

Answer → C) Isosceles triangle.

Two because two of one thing is two.