Question

I need to know how to find the volume of this triangle

Answer 1

That's a pyramid, not a triangle :)

The formula for the volume of a pyramid is 
V=(lwh)/3

So, plug in V=(6*6*4)/3 and solve
V=(6*6*4)/3
V=(36*4)/3
V=144/3
V=48

Hope this helped!

Answer 2

Area of a triangle = b*h/2
B=6
H=6
6*6=36
36/2= 18
A=18 cm