if the length of a chord of a circle is 16cm and is at a distance of 15cm from the centre.find the radius
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Pythagorean Theorem:
AB^2 + BC^2 = AC^2 or
15^2 + 8^2 = AC^2
AC^2 = 289
AC = square root of 289 = 17
AB^2 + BC^2 = AC^2 or
15^2 + 8^2 = AC^2
AC^2 = 289
AC = square root of 289 = 17
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