Answer:
A
Step-by-step explanation:
π=3.14159...
Full circle are 25π cm² = 25*3.14=78.5 cm²
Half 78.5 cm²/2 = 39.25 cm²
Answer:
-200 metre is less 450m because - 200 metre is negative.
Answer:
It's an irrational number
Step-by-step explanation:
Examples:
√2 = 1.4142135623730950488016887242096980785696718...
π = 3.14159265358979323846264338327950288419716939...
e = 2.718281828459045235360287...
∛10 = 2.1544346900318837217592935665193504952593449421921...
and more
If the number has a finite or repeating decimal, then it is a rational number.
Examples:
2.75
-1.3333...
0.4545454545...