How many triangles are in this figure?

[asy]size(50);
draw((0,0)--(1,0)--(0,0)--(0,1));
draw((1,1)--(0,1)--(1,0)--(1,1)--(0,0));[/asy]
Question:
How many triangles are in this figure?

[asy]size(50);
draw((0,0)--(1,0)--(0,0)--(0,1));
draw((1,1)--(0,1)--(1,0)--(1,1)--(0,0));[/asy]
Answer:
Let's think step by step.

user
8
How many triangles are in this figure?

[asy]size(50);
draw((0,0)--(1,0)--(0,0)--(0,1));
draw((1,1)--(0,1)--(1,0)--(1,1)--(0,0));[/asy]
train