which of the following three-dimensional figures is formed when an equilateral triangle is rotated around the x-axis of the coordinate plane? a)sphereb)cylinderc)cube
d)cone

I think that the D. CONE is the three-dimensional figure that will be formed when an equilateral triangle is rotated around the x-axis of the coordinate plane.

A sphere is defined as the set of all points in space that are a fixed distance from a common point, the center.

A cylinder is with two parallel congruent circular faces whose cross sections (taken parallel to these circular faces) are circular.

A cube is a rectangular prism whose faces are squares.

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