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March 3, 2015

Posted by **Austin** on Tuesday, November 15, 2011 at 6:26pm.

A. 1 sq mile is 640 acres. Assuming that the Tiananmen Square is a square, how many feet long is a side to the nearest foot?

B. To the nearest foot, what is the diagonal distance across the Tiananmen Square?

- Alg 1 -
**Reiny**, Tuesday, November 15, 2011 at 6:46pm640 acres = 640/98 square miles or 6.5306 square miles

so each side is √6.5306 miles or 2.5555 miles

diagonal^2 = 2.5555^2 + 2.5555^2 = 13.06122

diagonal = √13.06122 = 3.614 miles

I will leave it up to you to convert the above miles into feet

BTW, the square would not be measured in feet, square miles or acres.

They would use metres, and hectares

China has been using the metric system for over 100 years.

- Alg 1 -
**Steve**, Wednesday, November 16, 2011 at 12:16amErrr. Am I misreading something here?

98 acres = 98/640 = 0.153125 sq mi.

That's a square 0.3913 mi on a side.

That's 2066' on a side.

The diagonal is 2066√2 = 2922 ft.

- Steve is right - Alg 1 -
**Reiny**, Wednesday, November 16, 2011 at 10:04amsorry about that, of course Steve is right

I divided the wrong way, had a "Rick Perry" moment.

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