Rational numbers are numbers that can be written as a fraction.
Irrational numbers are decimals, that can't be written as a fraction.
3.14 is a rational number.
The square root of 3 is an irrational number
The square root of 2 and 1.3 are irrational numbers.
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Answer:

Step-by-step explanation:
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Answer:
160°
Step-by-step explanation:
1/2 (Major arc AB - Minor arc AB) = 20°
Major arc AB = 200°
Minor arc AB = 160°
central angle = minor arc AB = 160°