If a closed figure has three line segments joined end to end, it is a triangle. If two sides of a triangle are congruent, it is an isosceles triangle. Betty constructed a triangle in the geometry class. Based on the given statements, which is a valid argument?

Question

If a closed figure has three line segments joined end to end, it is a triangle.  If two sides of a triangle are congruent, it is an isosceles triangle.  Betty constructed a triangle in the geometry class.   Based on the given statements, which is a valid argument?

anonymous · Answer

It can be concluded that Betty drew a rectangle.
It can be concluded that Betty drew an isosceles triangle.
It cannot be concluded that Betty drew a triangle with two sides congruent.
It cannot be concluded that Betty drew a figure with three line segments joined end to end.

nali · Answer

it is the last answer

anonymous · Answer

It cannot be concluded that Betty drew a figure with three line segments joined end to end. <---incorrect.