Question

Pls tell me this answers guys

Answer 1

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ANSWER :-

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• First we want to find the area of the given rectangle :

length of given rectangle = 18 cm

breath of given rectangle = 14 cm

so,

• ⇒ Area of rectangle = l × b

• ⇒ Area of rectangle = 18 × 14

• ⇒ Area of rectangle = 252 cm²

➔ Now we want to cut out the area of semi-circle.

• ⇒ Area of circle = πr²

• $\sf{Area \: of \: semicircle = \frac{1}{2} \times \pi \times r \times r }$

• $\sf{= \frac{1}{2} \times \frac{22}{7} \times 7 \times 7 = \frac{1078}{14} = 77 {cm}^{2} }$

SO, The area of given figure is :

• area of rectangle - semicircle

• 252 - 77

• = 175 cm²

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∴ The area of the given figure

is 175 cm²

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IMPORTANT FORMULAS :-

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❥ SQUARE :-

Area of square = a²

Perimeter of square = 4a

❥ RECTANGLE :-

Area of rectangle = l × b

Perimeter of rectangle = 2(l+b)

❥ TRIANGLE :-

Area of triangle = ½b×h

Perimeter of triangle = a+b+c

❥ PARALLELOGRAM :-

Area of parallelogram = h × b

Perimeter of parallelogram = 2(a+b)

❥ CIRCLE :-

Area of circle = πr²

Perimeter of circle = 2 πr

❥ ROMBUS :-

Area of rombus = ½d¹d²

Perimeter of rombus = 4a

❥ TRAPIEZUIM :-

Area of trapezuim = h × a+b/2

Perimeter of trapezuim = a+b+c+d

❥ QUADRILATERAL :-

Area of quadrilateral = ½d(h¹+h²)

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