Question

The diagram shows a cone and its axis of rotation. If a plane passes through the axis of rotation, which type of cross section will be formed?

1. a circle
2. an isosceles triangle
3. a parabola
4. an oval

Answer 1

I belived it is A.Circle, but i am not for sure.

Answer 2

2) an isosceles triangle

Explanation:

Given that the diagram shows a cone and its axis of rotation.

A plane passes through the axis of rotation,

Then the image formed would be an isosceles triangle.

It cannot be a circle because only if plane passes perpendicular to axis of rotation circle will be formed

If plane is parallel to axis of rotation then parabola would be formed

If a plane making an angle not 90 cuts axis of rotation then an oval would be formed

So correct answer is option 2)

an isosceles triangle