This is a typical example of how you can be rewarded for being
a savvy test-taker. Did you recognize the common Pythagorean
ratio 3:4:5 that we learned in Geometry Basics? If you did,
you realized that the hypotenuse, AC, equals 5. Since
AC is also the circle's diameter, the correct answer
is 5.
Test Prep Lessons With Video Lessons and Explained MCQ
Large number of solved practice MCQ with explanations. Video Lessons and 10 Fully explained Grand/Full Tests.