Is 138 square kilometers as big as Lake Ontario?
It's about one-one-hundred-fiftieth as big as Lake Ontario
The size of Lake Ontario is about 18,960 square kilometers.
(a.k.a. Lac Ontario) (surface area)
The smallest of North America's Great Lakes (by surface area), Lake Ontario has a total area of 18,960 sq. km. It borders the cities of Toronto, Ontario, Canada and Rochester, New York.
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