What is the measure of the angle formed by the radius of a circle and a tangent to that circle?

👨🏻‍🏫 學術台數學

2017-02-03 9:33 am

回答 (2)

2017-02-03 11:05 pm

90⁰ at point of contact between tangent and radius

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2017-02-03 2:16 pm

90°

http://img.sparknotes.com/figures/4/4952adc59740c12b78738934e639a08a/tangentradius.gif

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