Final answer:
The ratios of the side lengths of right triangles change depending on the measure of the acute angle. Trigonometric functions can help determine these ratios.
Step-by-step explanation:
The ratios of the side lengths of right triangles change as you change the measure of the acute angle. The ratio depends on the trigonometric function being used. For example, the sine of the acute angle is equal to the ratio of the length of the side opposite the angle to the length of the hypotenuse. The cosine of the acute angle is equal to the ratio of the length of the side adjacent to the angle to the length of the hypotenuse.