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vesna_86 [32]
4 years ago
11

Aria unui dreotunghi este de 405 m2,iar latimea este de 15m.Calculeaza aria unui patrat care are latura egala cu un sfert din pe

rimetrul dreptunghiului.
Mathematics
1 answer:
ozzi4 years ago
5 0
The area would be 441 m².

We first find the length of the given rectangle.  We know area is length times width, that the area is 405 and the width is 15; this gives us:

405 = 15L

Divide both sides by 15:
405/15 = 15L/15
27 = L

Calculate the perimeter of the rectangle:
P = 2L + 2w = 2(27) + 2(15) = 84 m

The side of the square is 1/4 the perimeter of the rectangle we just found:
1/4(84) = 21 m

The area of a square is equal to its side length squared:
A = s² = 21² = 441 m²
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6 0
3 years ago
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4 years ago
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3 years ago
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