Answer:
531
Explanation:
The area of a circle can be determined by the equation: A = πr².
The "r-value" represents the radius, which is half of the diameter. Since the diameter is in cm, the area will have the unit cm².
d = diameter r = radius π = 3.14..... A = area
d / 2 = r
26 / 2 = r
13 cm = r
A = πr²
A = π(13)²
A = 169π
A = 530.929.... cm²
A = 531 cm²
As you can see, the radius was determined to be 13 cm. When you plug that value into the area equation, you get 530.9 cm². Rounding to the nearest whole number would bump the 0 to 1, making the final answer 531 cm².