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Assessment
What is the formula for the circumference of a circle?
C = 2πr
C = πd
C = πr²
C = r² + h²
What is the area of a circle with a radius of 5 units?
25π
10π
50
5π
If the diameter of a circle is doubled, how does its area change?
It is quadrupled.
It is doubled.
It remains the same.
It increases by a factor of three.
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