Explicación paso a paso:
a)
CIRCUNFERENCIA:
c= 2πr
c=2(3.1416)15
c=94.24 cm
Área:
A=π•r²
A=3.1416(15cm)²
A=3.1416 • 225 cm²
A= 706.85 cm²
b)
c=2(3.1416)20
c=125.66 cm
ÁREA:
A=3.1416(20cm)²
A=3.1416 • 400 cm²
A= 1,256.64 cm²
c)
c=2(3.1416)12
c= 75.39 cm
A=3.1416(12cm)²
A=3.1416 • 144 cm²
A= 452.39 cm²
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Verified answer
Explicación paso a paso:
a)
CIRCUNFERENCIA:
c= 2πr
c=2(3.1416)15
c=94.24 cm
Área:
A=π•r²
A=3.1416(15cm)²
A=3.1416 • 225 cm²
A= 706.85 cm²
b)
CIRCUNFERENCIA:
c= 2πr
c=2(3.1416)20
c=125.66 cm
ÁREA:
A=π•r²
A=3.1416(20cm)²
A=3.1416 • 400 cm²
A= 1,256.64 cm²
c)
CIRCUNFERENCIA:
c= 2πr
c=2(3.1416)12
c= 75.39 cm
ÁREA:
A=π•r²
A=3.1416(12cm)²
A=3.1416 • 144 cm²
A= 452.39 cm²