Which of the following correctly states the converse of the isosceles property of a triangle?
(a) If two sides of a triangle are equal, the angles opposite those sides are equal.
(b) If two angles of a triangle are equal, the sides opposite those angles are equal.
(c) If two sides of a triangle are equal, the triangle is right-angled.
(d) If two sides of a triangle are unequal, the angles opposite those sides are equal.