metre or feet
Measure it. Or take a quarter of its perimeter. Or take the square root of its area. Or take the cube root of a cube built on the square
Metres (in a built-up area), kilometres if across open spaces.
They built a wall around the city to keep out invaders.
They built a wall around the city to keep out invaders.
The baseball Hall of Fame was built at 1150 W. Columbus Avenue in Springfield, Massachusetts.
They built a wall around the city to keep out invaders.
They built a wall around the city to keep out invaders.
They built a wall around the city to keep out invaders.
They built a wall around city to keep out invaders
They built a wall around the city to keep out invaders.
They built a wall around the city to keep out invaders.
They built a wall around the city to keep out invaders.