I'll guess the answer is <em>you can tell that pi is an irrational because it has a </em>non-terminating yet non-repeating decimal representation.<em>
</em>
Of course it's not clear how we tell this. We can't know for sure just by looking at the first trillion digits we've figured out whether it repeats or not. Someone told us it didn't, that's really how we know.
Step-by-step explanation:
from the line above
P1 = -2
P2 = -1
P3 = 1/3
P4 = 2/3
P5 = 1 1/2 = 3/2
The product of P1 to P5,P
=> P = -2×-1×1/3×2/3×3/2 = 2/3
Assuming the figure has identifiable bases and sides, the total surface area is the sum of the areas of those:
... B. Base area + lateral area