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.
The vertical axis in a plane coordinate graph
The vertical axis in a plane coordinate graph
An isosceles triangle
An isosceles triangle has 1 vertical line of symmetry
Three
3
The sign for a vertical angle is......(I don't know actually >.
I believe that some cool projects are - Math in Chess Math in Probability Pascal's Triangle Serpinski's Triangle Math in Origami Binary Computer Coding Math in Magic Math in Music These are good topics.
Figure it out yourself
triangle