9 and 1/2 is the answer. We can find this by simply subtract 1 1/2 from 12.
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:
is the a. Perpendicular lines form 90° angles.
Answer:
16
Step-by-step explanation:
According to the given description, PS is the mid segment of the
Therefore by Mid-segment Theorem:

Answer:
4.77
if u use 3 for pie its 5
Step-by-step explanation:
formula is d=c/pie
so d=15/pie
d=4.77