The area north of the Arctic Circle is about 20,000,000 km2 (7,700,000 sq mi) and covers 4% of the Earth.
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1. Find the surface area of the whole cylinder 2. Find the area of one of the two circles on either end of the cylinder 3. Multiply the circle's area by two and subtract their area from the total surface area 4. Now you have the surface area of an unclosed cylinder!
Area of a circle = pi*radius2
The formula for the surface area of a circle is pi times the square of the radius. It is represented as A equals pi times r squared.
3,848.45mm2.
The surface area of a sphere with a diameter of 14 inches is about 615.8 square inches.