Answer:
Divide the numerator and denominator by the square root of 2 to get:

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Answer:
circle
radius
Step-by-step explanation:
1 ) The diameter measures the circle at its largest point across. Another definition that is related to the diameter is the radius. It is the measurement from the center of the circle to its edge.
2) When a circle's diameter is 1, its circumference is π. When a circle's radius is 1—called a unit circle—its circumference is 2π. -