Triangle: A figure formed by exactly three (non-colinear) points joined by line segments is a triangle.
A figure formed by three or more points is generally called a polygon. Of course, if all of the points are co-linear then there is not much of a figure.
A polygon has 3 or more sides.
False.
No. A trinagle does not require four points, three are sufficient. And any three points, if they are not colinear, must be coplanar.
twenty
draw 3 line segments connect the endpoint what figure is formed
a triangle is formed by line segments that connect two non-collinear points
its a triangle
a triangle
False.
fal;se
A triangle, but only if the line segments are straight.
That figure is best described as a "triangle".
False.
polygon
There is no specific name in general. If the line segments are straight, then it is a triangle.
It is a concave figure, which can only be formed in figures with four or more lines (quadrilaterals and above).
circle
No. A trinagle does not require four points, three are sufficient. And any three points, if they are not colinear, must be coplanar.