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How to measure a intercepted arc?

Sagot :

To measure intercepted arc with a central angle, the measurement of the central angle in degrees is also the measurement of the intercepted arc. If the central angle is 60° then the intercepted arc is also 60°.

To measure the intercepted arc with an inscribe angle, the measurement of the inscribe angle will be doubled. If the inscribe angle is 60°, the measurement of the intercepted arc is 120°.