Question

a cone is sliced such that the cross section is perpendicular to its base and the cross section intersects its vertex.
what is the shape of the cross section?
hint:
trapezoid
triangle
rectangle

Explanation:

A cross section that is perpendicular to a cone's base and passes through its vertex will form a closed shape with three straight sides: one side along the cone's vertex, and two sides along the cone's lateral surface, connecting to two points on the circular base. This matches the definition of a triangle.

Answer:

Triangle