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# pythagoras

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What is the length of CB?  Round your answer to the nearest hundredths place.

Mar 15, 2021

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we can use the Pythagorean theorem.

$$AB^2 = AC^2+CB^2$$

$$21^2 = 14^2 + CB^2$$

$$441 = 196 + CB^2$$

$$245 = CB^2$$

$$CB = \sqrt{245}$$

$$15.65$$

hope this helped! please let me know if you are still confused

Mar 15, 2021