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a cone with the line from the vertex to the centre of the base perpendicular to the base.
trigonometric ratio, expressed as opposite side divided by adjacent side in a right-angled...
the sum of the areas of all the planes of a three-dimensional object.
the axis of symmetry; or the line about which a figure is reflected.
the angle that a line makes with the positive x-axis.
a general change that you can see when examining data.