[tex]\large\overbrace{\underbrace{\text{${data-answer}gt;>>$ Review: ${data-answer}lt;<<$}}}[/tex]
Area of Circle is given by the formula:
A = πr²
where
A = Area
π = 3.14
r = radius*
* if length is given in diameter (d), simply divide diameter by 2 to get the radius. r = d/2
[tex]\large\overbrace{\underbrace{\text{${data-answer}gt;>>$ Solution and Answer: ${data-answer}lt;<<$}}}[/tex]
#1.
A = ?, when r = 20 cm
A = πr²
A = 3.14 (20)²
A = 3.14 (400)
A = 1256 cm²
[tex]\large\boxed{\boxed{A = 1256 \;cm^2}}[/tex]
#2.
A = ?, when d = 60 cm*
* r = d/2 = 60/2 = 30 cm
A = πr²
A = 3.14 (30)²
A = 3.14 (900)
A = 2826 cm²
[tex]\large\boxed{\boxed{A = 2826 \;cm^2}}[/tex]
#3.
A = ?, when d = 5 m*
* r = d/2 = 5/2 = 2.5 m
A = πr²
A = 3.14 (2.5)²
A = 3.14 (6.25)
A = 19.63 m²
[tex]\large\boxed{\boxed{A = 19.63 \;m^2}}[/tex]
#4.
A = ?, when r = 24 cm
A = πr²
A = 3.14 (24)²
A = 3.14 (576)
A = 1808.64 cm²
[tex]\large\boxed{\boxed{A = 1808.64 \;cm^2}}[/tex]
#5.
A = ?, when d = 19.5 m*
* r = d/2 = 19.5/2 = 9.75 m
A = πr²
A = 3.14 (9.75)²
A = 3.14 (95.0625)
A = 298.50 m²
[tex]\large\boxed{\boxed{A = 298.50 \;m^2}}[/tex]
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