The perimeter of a square is 72 cm, its area is : 1. 900√2 cm^2 2. 30√3 cm^2 3. 324 cm^2 4. 356 cm^2

Given: Perimeter = 72 cm Let `s` be the side of square. Perimeter = 4 x side ⇒ 4 x s = 72 ⇒ s = ⇒ s = 18 cm Area = Side 2 = 18 2 cm 2 = 324 cm 2 Hence, option 3 is the correct option.

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Mathematics

The perimeter of a square is 72 cm, its area is :
$900\sqrt{2} \text{ cm}^2$
$30\sqrt{3} \text{ cm}^2$
324 cm²
356 cm²

Mensuration

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Answer

Given:

Perimeter = 72 cm

Let s be the side of square.

Perimeter = 4 x side

⇒ 4 x s = 72

⇒ s = $\dfrac{72}{4}$

⇒ s = 18 cm

Area = Side²

= 18² cm²

= 324 cm²

Hence, option 3 is the correct option.

Answered By

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Mathematics

The perimeter of a square is 72 cm, its area is :
$900\sqrt{2} \text{ cm}^2$
$30\sqrt{3} \text{ cm}^2$
324 cm²
356 cm²

Mensuration

Answer

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The perimeter of a square is 72 cm, its area is :
$900\sqrt{2} \text{ cm}^2$
$30\sqrt{3} \text{ cm}^2$
324 cm²
356 cm²

If two adjacent sides and a diagonal of a rectangle are x, y and d respectively. The area of the rectangle is :
$x \times y$
$\dfrac{1}{2} \times\ d^2$
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$\dfrac{1}{2} \times\ y \times d$

A square DEFG of side 8 cm is inscribed in a rectangle of adjacent sides 20 cm and 16 cm as shown in the figure.
The area of the shaded portion is :
64 cm²
128 cm²
256 cm²
320 cm²

Area of a rhombus is 360 cm². If one diagonal of it is 20 cm; the other diagonal is :
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18 cm
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