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47) Find the area of a circle with diameter of 10 cm. Let pi = 3.14.
48) Find the area of a circle with radius of 2 cm. Let pi = 3.14.​

Respuesta :

dhiab

Answer:

Step-by-step explanation:

note :

the area of a circle  is : A= π×r²    ....r : radius and : D=2r   ... D : diameter

47) D = 10 cm      r= 10cm/2 = 5 cm

A=π×r²  = 3.1448×5²  =78.62cm²

48) A= 3.1448×2²= 12.58cm²

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