Lol I answered this question already
Answer:
72 cm³
Step-by-step explanation:
Volume of a triangular pyramid = a*(h/3), where a is the area of the base triangle and h is the height from the base to the highest point.
We need to first find a, the area of the bas triangle:
Area of triangle = (1/2)bh, where b is the length of the base and h is the perpendicular height.
a = (1/2)12*4
a = 6*4
a = 24 cm²
Knowing a, we can know find the volume:
Volume = a*(h/3)
= 24*(9/3)
= 24*3
= 72 cm³
Step 1. Step up long addition
1 . 4 2 0
+ 2 . 1 5 7
_________
Step 2. Calculate 0 + 7, which is 7.
1 . 4 2 0
+ 2 . 1 5 7
_________
7
Step 3. Calculate 2 + 5, which is 7.
1 . 4 2 0
+ 2 . 1 5 7
_________
7 7
Step 4. Calculate 4 + 1, which is 5.
1 . 4 2 0
+ 2 . 1 5 7
_________
5 7 7
Step 5. Calculate 1 + 2, which is 3.
1 . 4 2 0
+ 2 . 1 5 7
_________
3 . 5 7 7
Step 6. Therefore, 1.42 + 2.157 = 3.577
3.577
Done!