This line has a height of $1$ centimeter: https://cdn.kastatic.org/ka-perseus-graphie/1f0d2e01aab1c441aa52507b0e2ba2f34c140c36.svg Look at the block tower below. https://cdn.kastatic.org/ka-perseus-graphie/c3eb60bfe25a88300249332b87220d11c8fa268d.svg About how tall is the block tower?