Find the area of a semicircle with radius r​

Area of semicircle is

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To calculate the area of a semicircle

We are gonna have to use the formula :

π r² [ that is the formula to calculate the area of a semicircle ]

Step-by-step explanation:

If we want to calculate the radius of a semicircle with 4 ft --

we would first write the formula which is " π r²"

Then, you would write: π (4 ft)²

After that, you would write:   (3.14)(16)

Type that into a calculator and you would get 25.12  as your answer

--

Why did we write 3.14 and 16? [ (3.14)(16) ]

Bc, the first digits of pi are 3.14 .

We wrote 16 because 4² = 16 [ 4x4=16 ]

My explanation isn't that good so I would suggest watching the math antics video which is named "Circles, Circumference And Area"