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What sphere do you live in?
The sphere that we all live on is called the Earth. (It is not a perfect sphere, but close enough)
When was the sphere invented?
The sphere wasn't invented, it was natural, like the Earth is natural
Formula to find out the Earth's surface area?
The Earth is close enough to a sphere, so you can use the formula for a sphere: 4 x pi x r2. "r" is the radius; if you find the diameter of Earth somewhere, divide it by 2 to get the radius.The Earth is close enough to a sphere, so you can use the formula for a sphere: 4 x pi x r2. "r" is the radius; if you find the diameter of Earth somewhere, divide it by 2 to get the radius.The Earth is close enough to a sphere, so you can use the formula for a sphere: 4 x pi x r2. "r" is the radius; if you find the diameter of Earth somewhere, divide it by 2 to get the radius.The Earth is close enough to a sphere, so you can use the formula for a sphere: 4 x pi x r2. "r" is the radius; if you find the diameter of Earth somewhere, divide it by 2 to get the radius.
What is a half sphere of the earth called?
a Hemisphere
Who said that the earth is a sphere?
Columbus said the earth was sphere when he traveled to America
