The sum of lengths of all sides of a closed plane figure is called $$ \begin{array}{llll} ext { (a) area } & ext { (b) perimeter } & ext { (c) volume } & ext { (d) length }\end{array} $$ A string 16 cm long is used to form a square. The length of side the square is $$ \begin{array}{llll} ext { (a) } 4 \mathrm{~cm} & ext { (b) } 6 \mathrm{~cm} & ext { (c) } 3 \mathrm{~cm} & ext { (d) } 48 \mathrm{~cm}\end{array} $$

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The sum of lengths of all sides of a closed plane figure is called $$ \begin{array}{llll}	ext { (a) area } & 	ext { (b) perimeter } & 	ext { (c) volume } & 	ext { (d) length }\end{array} $$ A string 16 cm long is used to form a square. The length of side the square is $$ \begin{array}{llll}	ext { (a) } 4 \mathrm{~cm} & 	ext { (b) } 6 \mathrm{~cm} & 	ext { (c) } 3 \mathrm{~cm} & 	ext { (d) } 48 \mathrm{~cm}\end{array} $$

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### **1. The sum of lengths of all sides of a closed plane figure is called**

**Options:**
- **(a) area**
- **(b) perimeter**
- **(c) volume**
- **(d) length**

**Answer:** **(b) perimeter**

**Explanation:**
- **Perimeter** is defined as the total length around a closed figure, which is the sum of the lengths of all its sides.
- **Area** measures the surface covered by the figure.
- **Volume** pertains to the space occupied by a three-dimensional object.
- **Length** generally refers to the measurement of something from end to end, not necessarily the sum around a shape.

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### **2. A string 16 cm long is used to form a square. The length of a side of the square is**

**Options:**
- **(a) 4 cm**
- **(b) 6 cm**
- **(c) 3 cm**
- **(d) 48 cm**

**Answer:** **(a) 4 cm**

**Explanation:**
- For a **square**, all four sides are equal in length.
- The **perimeter** of the square is given by the total length of the string, which is 16 cm.
  
  $$
  \text{Perimeter} = 4 \times \text{Side length}
  $$
  
  $$
  16\, \text{cm} = 4 \times \text{Side length}
  $$
  
  $$
  \text{Side length} = \frac{16\, \text{cm}}{4} = 4\, \text{cm}
  $$

- Therefore, each side of the square is **4 cm** long.

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**1. The sum of lengths of all sides of a closed plane figure is called the perimeter.** **2. A string 16 cm long forms a square with each side measuring 4 cm.**

The sum of lengths of all sides of a closed plane figure is called

A string 16 cm long is used to form a square. The length of side
the square is

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The sum of lengths of all sides of a closed plane figure is called A string 16 cm long is used to form a square. The length of side the square is