Metro quadrado

O metro quadrado (símbolo: m2) é a unidade padrão de área, que foi adaptada para o Sistema Internacional de Unidades, e é derivada da unidade básica metro.[1] Corresponde à área de um quadrado com 1 metro de lado.[1]

Em agrimensura utilizam-se algumas unidades derivadas do metro quadrado, como o are (equivalente a 100 metros quadrados e a 1 decâmetro quadrado) e o hectare (equivalente a 10 000 metros quadrados e a hectômetro quadrado).[2]

Um erro comum em cálculos envolvendo áreas é considerar esta medida como uma medida linear; mas esta é uma medida quadrática. Por esse motivo, um quadrado com m de lado tem uma área de 4 m2 (= 2 m x 2 m).[3]

Exemplo: Um metro quadrado equivale a centímetros quadrados, pelo seguinte motivo: Um metro tem cem centímetros; então multiplicamos a largura pelo comprimento (ou seja, 100 cm x 100 cm), que é igual a 10 000 centímetros quadrados.[4]

Equivalências

No Sistema Internacional de Unidades

Um metro quadrado equivale a:

mm²
cm²
dm²
ares ou dam²
hectares ou hm²
km²

No Sistema Inglês

1 metro quadrado equivale a:

acres ()
jardas quadradas ()
pés quadrados ()
polegadas quadradas ()

Prefixos SI aplicado ao metro quadrado

O metro quadrado pode ser utilizado com todos os prefixos oficiais do usado com o medidor.

Os prefixos oficiais são:

Prefixo Base 10 Decimal Adoção
[nb 1]
Nome Símbolo
quetta Q 1030 1000000000000000000000000000000 2022[5]
ronna R 1027 1000000000000000000000000000
yotta Y 1024 1000000000000000000000000 1991
zetta Z 1021 1000000000000000000000
exa E 1018 1000000000000000000 1975[6]
peta P 1015 1000000000000000
tera T 1012 1000000000000 1960
giga G 109 1000000000
mega M 106 1000000 1873
quilo k 103 1000 1795
hecto h 102 100
deca da 101 10
100 1
deci d 10−1 0,1 1795
centi c 10−2 0,01
milli m 10−3 0,001
micro μ 10−6 0,000001 1873
nano n 10−9 0,000000001 1960
pico p 10−12 0,000000000001
femto f 10−15 0,000000000000001 1964
atto a 10−18 0,000000000000000001
zepto z 10−21 0,000000000000000000001 1991
yocto y 10−24 0,000000000000000000000001
ronto r 10−27 0,000000000000000000000000001 2022[5]
quecto q 10−30 0,000000000000000000000000000001
Notas
  1. Prefixos adotados antes de 1960 já existiam antes do SI. A introdução do sistema CGS foi em 1873.

Os prefixos oficiais aplicado ao metro quadrado são:

Multiplicação Nome Símbolo Multiplicação Nome Símbolo
[nota 1] [nota 2]
Um Metro quadrado Um Metro quadrado
decâmetro quadrado (are) decímetro quadrado
hectômetro quadrado (hectare) centímetro quadrado
Quilômetro quadrado milímetro quadrado
megametro quadrado micrômetro quadrado
gigametro quadrado nanômetro quadrado
terametro quadrado picômetro quadrado
petametro quadrado femtômetro quadrado
exametro quadrado attômetro quadrado
zettametro quadrado zeptômetro quadrado
yottametro quadrado yoctômetro quadrado

Transformação

Para transformar metros quadrados em centímetros quadrados, multiplicamos o número do metro quadrado por .

Exemplo: Para saber os centímetros quadrados de um terreno de quinhentos metros quadrados, multiplicamos por . Fica assim: , que é igual a de centímetros quadrados.

Ver também

Notas

  1. Significado de
    ().
  2. Significado de , Veja: Escalas curta e longa.

Referências

Ligações externas

Outros projetos Wikimedia também contêm material sobre este artigo:
Textos didáticos no Wikilivros
Definições no Wikcionário

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