Question

Find the area of ​​the circle whose diameter is 5 centimeters

Answer 1

⛦ Given :

• Diameter of circle = 5 cm

⛦ To find :

• The area of circle.

⛦ Solution :

To find the area of circle, first finding the radius of the circle.

Radius = Diameter/2

Radius = 5/2 = 2.5 cm

We know that,

★Area of circle = πr²

→Value of π = 22/7

According to Question,

⇒ Area (circle) = 22/7 × 2.5 × 2.5

⇒ Area (circle) = 3.143 × 6.25

⇒ Area (circle) = 19.643

⇒ Area (circle) = 19.63 (approx)

More formulas :

• Circumference of circle = 2πr
• Area of rectangle = length×breadth
• Area of square = side²
• Area of triangle = b×h/2

Answer 2

Question :-

• Find the area of the circle whose diameter is 5 cm.

Given :-

• Diameter of the circle = 5cm

To Find :-

• Area of the Circle .

Solution :-

★ Diameter = 2 × Radius ★

${:} \longrightarrow \sf{\sf{ 5 \: = \: 2 \: \times \: Radius \: }}$

${:} \longrightarrow \sf{\sf{ \dfrac{5}{2} \: = \: \: Radius \: }}$

${:} \longrightarrow \sf{\bf{ 2.5cm \: = \: \: Radius \: }}$

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★ Area of Circle = πr² ★

$\longmapsto \sf{\sf{ Area \: of \: Circle \: = \: \dfrac{22}{7} \: \times \: 2.5 \: \times \: 2.5 }}$

$\longmapsto \sf{\sf{ Area \: of \: Circle \: = \: \dfrac{22}{7} \: \times \: 6.25 }}$

$\longmapsto \sf{\sf{ Area \: of \: Circle \: = \: \dfrac{137.5}{7} }}$

$\longmapsto \sf{\bf{ Area \: of \: Circle \: = \: 19.64cm^{2} }}$

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So, the Area of of Circle is 19.64cm²

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Additional Info :-

• Area of Square = Side x Side
• Area of Rectangle = Length × Breadth
• Area of Triangle = ½ × base x height
• Area of parallelogram = base x height
• Area of circle = πr²
• Area of Rhombus = ½ × product of its diagonals
• Area of Trapezium = ½ × height × sum of parallel sides
• Area of Polygon = sum of the area of all regions into which it is divided

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