Answer:
To calculate the area of a semicircle
We are gonna have to use the formula :
[tex]\frac{1}{2}[/tex] 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 "[tex]\frac{1}{2}[/tex] π r²"
Then, you would write: [tex]\frac{1}{2}[/tex] π (4 ft)²
After that, you would write: [tex]\frac{1}{2}[/tex] (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? [ [tex]\frac{1}{2}[/tex] (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"
