Lesson: Geometry Challenging - 15t01

Finding The Diameter

[Page 15 of 32]

Task: Find the diameter of Circle O. Type your answer into the text box, and then click Continue.

Diameter = 5

Since ABC has diameter AOC as one side, ABC is a right triangle with hypotenuse AC.

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.

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