Question

If a triangle is rotated about the y-axis as shown below, what three-dimensional figure would be formed? (1 point)

An image of a right triangle centered at the origin is shown with an arrow showing motion about the y axis.

Triangular prism

Cone

Cylinder

Square pyramid

Answer 1

When a right triangle is rotated about the y-axis, it forms a three-dimensional figure known as a cone. Specifically, the vertex of the triangle will become the apex of the cone, and the base of the triangle will create the circular base of the cone.

Therefore, the correct answer is **Cone**.