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2 years ago

The diagram shows a rectangle. 5cm 1cm four of these rectangles are put together as shown, calculate the shaded area

Mathematics

2 answers:

GarryVolchara [31]2 years ago

7 0

Answer:

15 cm²

Step-by-step explanation:

5 + 1 + 1 = 7

7 × 5 = 35

5 × 1 = 5

5 + 5 + 5 + 5 = 20

35 - 20 = 15

aalyn [17]2 years ago

6 0

Answer:

15 sq.cm

Step-by-step explanation:

Length of the shaded rectangle = length of the unshaded rectangle = 5 cm

Breadth of the shaded rectangle = 5 - ( 1 + 1) = 5 - 2 = 3 cm

Area of the shaded rectangle = 5 * 3 = 15 sq.cm

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Mice21 [21]

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Step-by-step explanation:

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3 years ago

What is th difference in length between a 1 1/4 inch button and a 3/8 inch button

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2 years ago

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Y_Kistochka [10]

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3 years ago

A long paper strip with a width of 5 cm is folded, as shown in the picture. Find the smallest possible area of the gray triangle

Stolb23 [73]

By using some logic and the formula of the triangle's area, we will find that the smallest possible area is 12.5 cm²

How to start thinking about the problem.

First of all, for the configuration of this paper strip, we can see that the base of the triangle will always be equal of the width of the paper. Thus, the smallest area will be only dependent of the height of the triangle.

Now, we need to analyze the picture to figure out how we can get the smallest height possible for that triangle.

What is the smallest height possible.

Doing this, we shall see that the smallest height possible is actually when the height equals the width itself, as it's shown in the attached image.

How to calculate the smallest area possible.

Thus, to calculate the smallest area, we just have to use the formula of the area of the triangle, which is $\frac{b\times h}{2}$ , where b is the base and h is the height.