The volume of a cube is the length of one of its sides (since all sides have equal length, for a cube) cubed. To find the side length from the volume, find the cubic root - in this case, it is easy as the cubic root of 8 is exactly 2. Now, because the centre of the cube is halfway between one side and its opposite, and one side being its base, the distance from the centre to that base will be half of its side length. For this cube, this is 2/2 which is 1.
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It is the perpendicular distance.
Volume = Base x Height /3 Where base is the area of the base circle (pi*radius*radius) and Height is the perpendicular distance from the base to the apex of the cone
1/3 times the area of the base times the height from the center of the base to the apex.
The volume of any prism is the product of the area of the base and the distance between the two bases(i.e. Height)
area = 1/2 x base x height The base of the triangle is any side (usually one horizontal at the bottom) and the height is the shortest distance from this side to the opposite vertex. The shortest distance is when a line drawn from the vertex meets the side at 90o (the perpendicular distance).