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21 x 21 = 441 sq in or 3.06 sq ft
no there is 24in in 2ft
4.96 square feet.
No triangle can have 4 sides of measurements
53.34 cm
1:21 or 1/21
6/7
2/3
The diameter is 6.68 inches.
147 sqin
10/21 is its simplest form.
Can range from 5,000 to 65,000
Dozens of them.