Problem 133 of 7
Decide whether to use a trig ratio or the Pythagorean Theorem for two side lengths are known and one side is unknown.
Using a hint is okay. It just tells the trainer to give you a little more review.
Hidden until you reveal it.
choose method from known information.
Hidden until you reveal it.
Choice must be based on whether side-side or side-angle information is available.
Enter your answer
Your answer is equivalent to the expected form.
Walkthrough
Full solution stays hidden until you ask for it.
1. List the known sides and angles.
2. Determine whether the unknown is a side or angle.
3. Choose Pythagorean theorem, trig, inverse trig, or insufficient information.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Using Pythagorean theorem to find an angle directly.