In the triangle ABC, the angle C is the right angle A is 40% and the angle B is -60% of the angle C.

In the triangle ABC, the angle C is the right angle A is 40% and the angle B is -60% of the angle C. Find the value of the sum of the angles of the triangle ABC.

Since the angle C of the triangular ABC is straight, the value of the angle C is 90.

Next, we find the angle A:

90 * 40/100 = 36;

angle A = 36;

Find angle B:

90 * 60/100 = 54;

angle B = 54;

find the sum of the angles of the triangle ABC:

90 + 36 + 54 = 180.

Answer: angle A = 36, angle B = 54, the sum of the angles of the triangle ABC = 180.