Respuesta :

jerrelltng

Answer:

116

Step-by-step explanation:

Area of Circle is [tex]\pi r^{2}[/tex].

There are two circles in this question. 1 is the large circle with radius 6.5cm and the smaller circle with radius of 2.3cm.

Area of shaded area = Area of large circle - area of small circle

∴

Area of shaded =[tex]\pi 6.5^{2} - \pi 2.3^{2}[/tex]

Area of shaded [tex]=116.113[/tex]

                          [tex]= 116[/tex] (3 significant figures)

Answer:

116 cm²

Step-by-step explanation:

The shaded area = outer area - inner area

outer area = πr² ( with r = 6.5 ), thus

outer area = π × 6.5² = 42.25π cm²

inner area = πr² ( with r = 2.3 ), thus

inner area = 5.29π cm²

Thus

shaded area = 42.25π - 5.29π = 36.96π ≈ 116 cm² (to 3 significant figures )

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