To find the volume of a triangular pyramid, the formula is:

So we start by finding the area of the base, which is in the shape of a right triangle in this case.
The area of a right triangle is equal to 1/2 x base x height.

We use this area to find the volume.

The volume of the triangular pyramid is 30 cubic feet.
Answer:
20x6
Step-by-step explanation:
20x (x stands for multiply/times)
6(sum/add 4+2)
20x6
Hope this helps.
You circle the points on both sides and then you calculate them and get what you need...