Area = Pi*r2 = Pi*92 = approximately 254.47cm2
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A circle with a radius of 9 cm has an area of 254.47 square cm
To find the diameter of a circle with an area of 254 cm², you first need to calculate the radius. The formula for the area of a circle is A = πr², where A is the area and r is the radius. So, 254 = πr². Solving for r gives you r ≈ √(254/π) ≈ 9 cm. The diameter of a circle is twice the radius, so the diameter of this circle is approximately 18 cm.
circumference = pi*18 cm area = pi*92 square cm
A circle with a diameter of 8.5 cm has an area of 56.75 square cm
The area of a circle that has diameter of 3 cm is: 7.069 cm2