Question

Read the following statement.

The figure is a triangle.

What is the first step of indirectly proving this statement?


Assume the figure does not have three sides.


Assume the figure has three sides.


Assume the figure is not a triangle.


Assume the figure is a triangle.

Answer 1

if the figure is indeed a triangle, TRI=3, it means is a polygon with 3 sides, so one can safely assume that.

Answer 2

Assume that the figure does not have three sides.

Explanation:

I think that "indirectly" can be a demostration by contradiction. In that case, the first step would be and false assumption about triangles. That is, Assume that the figure does not have three sides.