Area of circle:
A = πr²
π = 22/7, or 3.14 (simplified)
'a line all the way across' means a diameter, which is 28 cm. To find the radius, divide the diameter by 2:
28/2 = 14
Plug in 14 (the radius) to r inside the equation:
A = πr²
A = π(14)²
14² = 196
A = π(196)
π = 3.14
A = 196(3.14)
A = 615.44
615.44cm² is the area of the circle
hope this helps
