Which of the following two-dimensional shapes can be rotated to create a cone?

Right triangle
Square
Circle
Ellipse

A right-angle triangle

Step-by-step explanation:

When a triangle is rotated, it forms a cone

keene f. ffnfnfnfnfnfnfn f bfnfnfnfnfj

option a is correct.

only one solution to the system of equations

step-by-step explanation:

if the graph of the equations do not intersects(i.,e if they are parallel) then, there are no solutions that are true for both the equations.

if the graph of the equations intersects, then there is one solution and that is true for both the equations.

since, in the given figure:

the two lines intersect each other

⇒there is only one solution which satisfy both the lines of an equations.

therefore, there is only one solution to the system of equation