There is no name for it except "A line perpendicular to a line segment and passing through its midpoint".
bisector?
Circumcenter, this is the center-point of a circle circumscribed around the triangle. If the triangle is obtuse, then this point is outside the triangle and if the triangle is a right triangle, then the point is the midpoint of the hypotenuse.
You may be thinking of the perpendicular line because the area of a triangle is 0.5*base*perpendicular height
== == An isosceles triangle with sides 5, 5, 3. The only line of symmetry is the line joining the midpoint of the side of 3 units to its opposite vertex.
There is no name for it except "A line perpendicular to a line segment and passing through its midpoint".
It is a perpendicular bisector line
bisector?
Circumcenter, this is the center-point of a circle circumscribed around the triangle. If the triangle is obtuse, then this point is outside the triangle and if the triangle is a right triangle, then the point is the midpoint of the hypotenuse.
You may be thinking of the perpendicular line because the area of a triangle is 0.5*base*perpendicular height
== == An isosceles triangle with sides 5, 5, 3. The only line of symmetry is the line joining the midpoint of the side of 3 units to its opposite vertex.
There is no specific name. It is one of the medians, angle bisectors and perpendicular bisectors: one set of these is coincident and is the line of symmetry.
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.
all the sides
A normal line is the name of the line drawn perpendicular to the surface where a light ray strikes.
A normal line is the name of the line drawn perpendicular to the surface where a light ray strikes.
circumcenter