Problem 50 of 7
Use angle-in-a-semicircle theorem for Inscribed angle intercepts a 180-degree arc.
Using a hint is okay. It just tells the trainer to give you a little more review.
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recognize diameter-intercepted arc gives right angle.
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Inscribed angle must intercept a diameter or semicircle.
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Your answer is equivalent to the expected form.
Walkthrough
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1. Identify the diameter or semicircle arc.
2. Recognize the inscribed angle intercepts 180 degrees.
3. Take half of 180 degrees to get 90 degrees.
Use the worked steps, then substitute the final answer back into the original relationship to confirm it satisfies the prompt.
Saying the central angle is 90 degrees; the intercepted arc is 180 degrees.