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MiSantos14
@MiSantos14
January 2020
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Calcule a área em cm² desta figura mas antes utilize o teorema de Pitágoras para encontrar as medidas desconhecidas
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polessa
13^2= 5^2 + x^2
169= 25 + x^2
x^2 = 169-25
x^2 = 144
x = -/144
x= 12
12 x 5= 60cm2
2 votes
Thanks 6
walterpradosamp
A B
AC = BD = 5 cm
C D AD = BC = 13 cm
AB = CD = ?
PITÁGORAS
h² = a² + x²
13² = 5² + (AB)²
169 = 25 + (AB)²
169 - 25 = (AB)²
144 = (AB)² AB = √144 AB = 12 cm
AREA DO RETÂNGULO
A = c .l
A = 12 . 5 =
60 cm² resposta
3 votes
Thanks 5
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Lista de comentários
169= 25 + x^2
x^2 = 169-25
x^2 = 144
x = -/144
x= 12
12 x 5= 60cm2
AC = BD = 5 cm
C D AD = BC = 13 cm
AB = CD = ?
PITÁGORAS
h² = a² + x²
13² = 5² + (AB)²
169 = 25 + (AB)²
169 - 25 = (AB)²
144 = (AB)² AB = √144 AB = 12 cm
AREA DO RETÂNGULO
A = c .l
A = 12 . 5 = 60 cm² resposta