Final answer:
The true equation that relates the acute angles A and C of a right triangle ABC is A + C = 90 degrees, signifying that the sum of angles A and C is equal to the right angle B.
Step-by-step explanation:
The equation that relates the acute angles, A and C, of a right triangle \ABC is based on the fact that the sum of angles in any triangle is 180 degrees.
Since angle B is a right angle (90 degrees), the sum of the acute angles A and C must be 90 degrees as well.
Therefore, the true equation relating angles A and C is:
A + C = 90 degrees
This equation stipulates that if you know one acute angle of a right triangle, you can always find the other by subtracting the known angle from 90 degrees.
For example, if angle A equals 30 degrees, then angle C would be 60 degrees.