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murzikaleks [220]
2 years ago
6

Step 1: C = 2r Step 2: 6 = 2r Step 3: r = 6/2 Step 4: r = 3 Step 5: A = 360°/x° × × r^2 Step 6: A = 360°/72° × × (3)^2 Step 7:

A = 5 × × (3)^2 Step 8: A = 45
Identify the step where Gwen first made an error
A. Step 5
B. Step 6
C. Step 3
D. Step 7 ​

Mathematics
1 answer:
tangare [24]2 years ago
5 0

Answer: A

Step-by-step explanation:

She found the ratio of the circumference to the sector. not the ratio of the sector to the circumference.

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Answer:

Area of the shaded part is 3.14 square unit.

Step-by-step explanation:

Area of the shaded part = Area of large semicircle - (Area of two small semi circles)

Area of large semicircle with center O = \frac{1}{2}(\pi r^2)

                                                                = \frac{1}{2}\pi (2)^{2}

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Area of semicircle with center O' = \frac{1}{2}\pi (1)^2

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Now substitute these values in the formula,

Area of shaded part = 2\pi - (\frac{\pi }{2}+\frac{\pi }{2})

                                  = \pi

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Area of the shaded part is 3.14 square unit.

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Step-by-step explanation:

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