Answer to Question #148939 in Geometry for solid mensuration

Question

_14. What is the surface generated by moving a straight line which always intersects a fixed plane curve and which always passes through a fixed point not in the plane of the curve?

Answer 1

Cone, the surface  traced by a moving straight line (the generatrix) that always passes through a fixed point (the vertex).

The surface generated by moving a straight line (the generatrix) which always intersects a fixed plane curve and which always passes through a fixed point not in the plane of the curve (the vertex) is a right circilar cone.

d) Right Circular Cone