WAEC - Mathematics (2007 - No. 31)
A chord of length 6cm is drawn in a circle of radius 5cm. Find the distance of the chord from the centre of the circle.
2.5cm
3.0cm
3.5cm
4.0cm
Giải thích
Distance(d) = d\(^2\) = 5\(^2\) - 3\(^2\)
= 25 - 9 = 16
d = \(\sqrt{16}\) = 4cm