3
4
You would have 8 right-angled triangles inside the square.
Different triangles may have none, one, or three lines of symmetry.
One star has five triangles on the sides, and about three in the middle, if enough lines are drawn.
3
24
yes
All triangles - equilateral or not - have three straight sides.
4
4
There is no specific name. Using a single straight line, a rectangle can be halved into triangles, smaller rectangles, or pentagons. There are infinitely many possibilities using more than one lines in the cut.
You would have 8 right-angled triangles inside the square.
There are eleven.
3
never tried it without my Gay lines so I wouldn't know for sure, but try 3 and see what you get
There are 16 possible triangles.