Problema Solution
A chord of a circle is 9cm long. If its distance from the centre of the circle is 5cm . calculate the radius of the circle( show diagrams)
Answer provided by our tutors
2a = 9 cm
a = 9/2 cm
a = 4.5 cm
Using the Pythagorean Theorem we have:
r^2 = a^2 + 5^2
r^2 = 4.5^2 + 5^2
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r = 6.7 cm
The radius of the circle is 6.7 cm.