In a triangle ABC, the angle A = 51 sides are equal to how many degrees are the angle C.

Let’s understand the condition of the problem.

If the sides of the triangle ABC are equal, (said in the condition), then it is equilateral, which means that all its sides and angles are equal, but this cannot be, because the sum of the angles of the triangle is 180 degrees, and 51 * 3 = 153.

The condition is written incorrectly. This means not an equilateral triangle, but an isosceles one.

If angle A is the base angle, then angle B is the vertex, and angle C is equal to it = 51 degrees.
If angle A is a vertex, then angle C = (180 – angle A) / 2 = 64.5 degrees.