A sphere is a perfectly round solid figure. All points on the surface of the shape are the same distance away from the centre – we call this distance the radius. The formula for the volume and ...
Remember that the circumference of a circle \(= \pi \times d\) and the diameter \(= 2 ... a hemisphere is a curved surface which is half of the surface area of the sphere, \(2Ï€r^2\) and a ...
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