aaronroberson4460 aaronroberson4460

09-04-2019
Mathematics

contestada

Work out the area of a semicircle with radius 3cm. give your answer in terms of 3.142

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mathkid14 mathkid14

09-04-2019

1.5 • 3.142= 4.713 should be the answer

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tramserran tramserran

09-04-2019

Answer: 4.5π ≈ 14.14 cm²

Step-by-step explanation:

[tex]Area_{\ circle}=\pi \cdot r^2\\\\Area_{\ semicircle}=Area_{\ circle}\div 2\\\\\\A=\dfrac{\pi \cdot 3^2}{2}\\\\\\.\quad =\dfrac{9}{2}\pi\\\\\\.\quad =4.5\pi\\\\\\.\quad =14.14[/tex]

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