There is no specific name in general. If the line segments are straight, then it is a triangle.
There is no specific name - other than what you used: "a pair of parallel line segments".
A square, a rectangle, a quadrilateral, or a trapezoid. (there's more, but I won't bore you)
a triangle
Shapes with no names are typically referred to as "irregular shapes." These shapes do not have specific labels such as circle, square, or triangle, as they do not conform to any standard geometric definition. Irregular shapes can have varying sides, angles, and measurements, making them unique and not easily categorized.
name one pair of perpendiclur line segments?
Usually a line segment in a triangle is either assigned a letter, or is referred to by the letters at the end of the segment with a line overhead. For instance, if you have a triangle ABC, you'll have segments AB, AC, and BC. And there would be a line over each segment name.
There is no specific name in general. If the line segments are straight, then it is a triangle.
There is no specific name - other than what you used: "a pair of parallel line segments".
The answer depends on what point of concurrency you are referring to. There are four segments you could be talking about in triangles. They intersect in different places in different triangles. Medians--segments from a vertex to the midpoint of the opposite side. In acute, right and obtuse triangles, the point of concurrency of the medians (centroid) is inside the triangle. Altitudes--perpendicular segments from a vertex to a line containing the opposite side. In an acute triangle, the point of concurrency of the altitudes (orthocenter) is inside the triangle, in a right triangle it is on the triangle and in an obtuse triangle it is outside the triangle. Perpendicular bisectors of sides--segments perpendicular to each side of the triangle that bisect each side. In an acute triangle, the point of concurrency of the perpendicular bisectors (circumcenter) is inside the triangle, in a right triangle it is on the triangle and in an obtuse triangle it is outside the triangle. Angle bisectors--segments from a vertex to the opposite side that bisect the angles at the vertices. In acute, right and obtuse triangles, the point of concurrency of the angle bisectors (incenter) is inside the triangle.
Straight
Which pair. Of line is parallel fghj
A plane shape. There is no specia name unless all the line segments are straight.
Convex
line segments
Yes. AB, AC, BC and EF.
figure