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qwelly [4]
3 years ago
11

A chord in a circle is 18 cm long and is 5 cm from the center of the circle. How long is the radius of the circle?

Mathematics
1 answer:
zzz [600]3 years ago
4 0

Answer:

r=\sqrt{106}\ cm

Step-by-step explanation:

see the attached figure to better understand the problem

Applying Pythagoras Theorem in the right triangle ODB find the radius of the circle

r^{2}=9^{2}+5^{2}

r^{2}=81+25

r=\sqrt{106}\ cm

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