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jarptica [38.1K]
4 years ago
8

What is the area of a semi-circle with a diameter of 6cm?

Mathematics
2 answers:
Readme [11.4K]4 years ago
6 0

Answer:

Area of the semicircle = 14.13cm^2

Step-by-step explanation:

Area of a circle=\pi r^2

Area of a semicircle= \pi r^2/2

For:

  Diameter=6 cm

 Radius= 6/2=3 cm

As, \pi =\frac{22}{7}=3.14

Area of the semicircle:

                  =(3.14*3*3)/2

          =(3.14*9)/2\\\\=28.26/2\\\\=14.13cm^2

Area of the semicircle = 14.13cm^2

ANEK [815]4 years ago
3 0

Formula for the area of a circle: A = pi * r^2

A semi-circle is half of a circle. So, we will need to divide the area of the total circle by 2 to find the area of a semi-circle.

r = d / 2

r = 6 / 2 = 3

A = pi * 9

A = 9pi

Semi-circle:

A = 9pi / 2

A = 4.5 pi cm^2 or 14.14 cm^2

Hope this helps!! :)

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