It is the triangle's perpendicular altitude
To do triangle math on "Brain Age" when there are four numbers on top of the screen, a person has to draw a triangle, then draw a vertical line straight down the middle. Each triangle then shares the line in the middle.
Depends on the orientation of the triangle.
An isosceles triangle
An isosceles triangle has 1 vertical line of symmetry
The vertical axis in a plane coordinate graph
The vertical axis in a plane coordinate graph
3
Three
we get a triangle
Figure it out yourself
Vertical.
triangle