What equation can be used to find the circumference of the circle? 4.5in
The equation that can be used to find the circumference of a circle is:
C = 2πr
where C is the circumference, π (pi) is a mathematical constant approximately equal to 3.14, and r is the radius of the circle.
If the radius of the circle is 4.5 inches, then the circumference can be calculated as:
C = 2π(4.5)
C = 9π
C ≈ 28.27 inches
Therefore, the circumference of the circle with a radius of 4.5 inches is approximately 28.27 inches.