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kennaklein2
15.07.2019 •
Mathematics
What is the surface to a rectangular playing surface with 44 feet and 77 feet?
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Ответ:
A = (44 ft)(77 ft) = 3388 ft^2
Ответ:
(-4, 3)
(0, -3)
(2, 4)
(0, 2)
we can solve for the area of the polygon by using the formula
a = 0.5 | x1 x2 x3 |
| y1 y2 y3 |
putting the coordinates in a matrix:
a = 0.5 | -4 0 2 0 |
| 3 -3 4 2 |
getting the determinant
a = 0.5 (12 + 4 - (-6) - (-8))
a = 15
the area is 15 square units