Question

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

Answer 1

1.5 • 3.142= 4.713 should be the answer

Answer 2

Answer:   4.5π  ≈  14.14 cm²

Step-by-step explanation:

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