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Korolek [52]
3 years ago
15

A diagram shows a square with a perimeter of 40cm. Work out the percentage of the area inside the square that is shaded.

Mathematics
2 answers:
scoundrel [369]3 years ago
8 0

Answer:

70%

Step-by-step explanation:

otez555 [7]3 years ago
6 0

Answer:

Step-by-step explanation:

10×10=100

3×10=30

6×10=60

15+30=45

100-45=55

55cm²

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Step-by-step explanation:

Step 1:

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There are 3 triangles and 1 square in the figure.

Step 2:

All the triangles are similar.

The surface area of a triangle = \frac{1}{2} (baselength)(height).

The similar triangles have a base length of 3 feet and a height of 2.5 feet.

The surface area of 1 similar triangle = \frac{1}{2} (3)(2.5)= 3.75 square feet.

The surface area for all the similar triangles = 3.75 (4) = 15 square feet.

Step 3:

The surface area of a square is the square of its side length. The square has a side length of 3 feet.

The surface area of the square = a^{2} = 3^{2} =9 square feet.

Step 4:

To calculate the total surface area we sum up all the individual surface area.

The total surface area = 15 + 9 = 24 square feet which is the third option.

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2 years ago
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fiasKO [112]

Answer:

see explanation

Step-by-step explanation:

Given

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7 0
3 years ago
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Answer:

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Step-by-step explanation:

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4 0
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