Hello!
We first have to find the area of the first triangle
To find an area of a triangle we use the equation

where h is the height and b is the base
This give us an area of 48
Now we know the area we can inverse the equation to do
48 =

We multiply 2 to both sides
96 = h * b
You can use any numbers that multiply to 96
One of the answer is the base is 12 and the height is 8
Hope this helps!