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xz_007 [3.2K]
3 years ago
7

Alex has a small notebook that is shaped like a rectangle. She knows one side is 6 cm and another side is 4 cm. Explain how to f

ind the distance around the notebook without using a ruler.
Mathematics
2 answers:
kkurt [141]3 years ago
8 0

Answer : The distance around the notebook is, 20 cm

Step-by-step explanation :

Given:

Length of rectangle = 6 cm

Breadth of rectangle = 4 cm

As we know that perimeter (distance) is the sum of all side of a given figure.

As there are 4 sides of rectangle.

Perimeter of rectangle = 2(Length + Breadth)

Perimeter of rectangle = 2(6 cm + 4 cm)

Perimeter of rectangle = 2(10 cm)

Perimeter of rectangle = 20 cm

Therefore, the distance around the notebook is, 20 cm

brilliants [131]3 years ago
5 0
6+6+4+4
Add all of the side lengths together.
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Answer:

Height of the object is 68.6 cm.

Step-by-step explanation:

The height of the object can be determined by:

\frac{object distance from pinhole}{image distance from pinhole} = \frac{object height}{image height}

From the given question;

object distance from pinhole = 3.6 m = 360 cm

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So that;

\frac{360}{4.2} = \frac{object height}{0.8}

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Thus, the height of the object is 68.6 cm.

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3 years ago
Round off then estimate 18.9*5.2
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