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

Explanation:

`Area_(\ circle)=\pi \cdot r^2\\\\Area_(\ semicircle)=Area_(\ circle)/ 2\\\\\\A=(\pi \cdot 3^2)/(2)\\\\\\.\quad =(9)/(2)\pi\\\\\\.\quad =4.5\pi\\\\\\.\quad =14.14`