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Agrupamento de Escolas
Marinhas do Sal
FICHA DE REVISÕES DE MATEMÁTICA – 6ºAno
Nome: __________________________________________________________ Turma:____ Nº: ____ Data: ___ / ____ /____
Ass. do EE:________________________________________
 Utiliza 3,1416 para valor aproximado de π. Apresenta todos os cálculos.
1. Na figura 4 está representada uma circunferência de centro O.
• Os pontos A, B e C pertencem à circunferência.
• [CD] é a altura do triângulo [ABC].
Sabe-se que 11
,6
AB  cm e 4
CD  cm.
1.1. Assinala a opção correta.
 (A) Os pontos 𝐴, 𝑂 e 𝐵 pertencem à circunferência.
 (B) Os pontos 𝐴, 𝑂 e 𝐵 pertencem à semirreta 𝑂̇𝐴.
 (C) Os pontos 𝐴, 𝑂 e 𝐵 pertencem ao segmento de reta [𝑂𝐵].
 (D) Os pontos 𝐴, 𝑂 e 𝐵 pertencem ao círculo.
1.2. Usando as letras da figura, indica:
a) Um raio _________ b) Um diâmetro _________ c) Uma corda _________
1.3. Classifica o triângulo [𝐴𝐵𝐶]:
a) Quanto aos lados; _________________________________________________
b) Quanto aos ângulos. _________________________________________________
1.4. Determina, com aproximação às unidades do centímetro quadrado (caderno):
a) A área do triângulo [ABC];
b) A área da parte colorida da figura.
2. Na figura seguinte está representada uma circunferência de centro em O.
2.1. Identifica:
a) Um diâmetro _____ b) Um raio _____
c) Uma corda _____ d) Um ângulo ao centro _____
2.2. Pinta na figura um setor circular.
2.3. Desenha na figura uma reta tangente à circunferência no ponto E.
Figura 4
3. Determina a área de cada uma das figuras seguintes (caderno).
4. Observa a figura seguinte e indica:
4.1. O comprimento do diâmetro _____
4.2. O comprimento do raio _____
4.3. O perímetro do círculo
4.4. A área do círculo
5. Determina o perímetro e a área das figuras (caderno).
a) b) c)
6. A figura é formada por um triângulo equilátero e por um semicírculo.
O semicírculo tem 12 cm de diâmetro. Determina o perímetro, em centímetros, da figura.
Apresenta o resultado arredondado às unidades.
7 cm

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Ficha de revisão areas e perimetros

  • 1. Agrupamento de Escolas Marinhas do Sal FICHA DE REVISÕES DE MATEMÁTICA – 6ºAno Nome: __________________________________________________________ Turma:____ Nº: ____ Data: ___ / ____ /____ Ass. do EE:________________________________________  Utiliza 3,1416 para valor aproximado de π. Apresenta todos os cálculos. 1. Na figura 4 está representada uma circunferência de centro O. • Os pontos A, B e C pertencem à circunferência. • [CD] é a altura do triângulo [ABC]. Sabe-se que 11 ,6 AB  cm e 4 CD  cm. 1.1. Assinala a opção correta.  (A) Os pontos 𝐴, 𝑂 e 𝐵 pertencem à circunferência.  (B) Os pontos 𝐴, 𝑂 e 𝐵 pertencem à semirreta 𝑂̇𝐴.  (C) Os pontos 𝐴, 𝑂 e 𝐵 pertencem ao segmento de reta [𝑂𝐵].  (D) Os pontos 𝐴, 𝑂 e 𝐵 pertencem ao círculo. 1.2. Usando as letras da figura, indica: a) Um raio _________ b) Um diâmetro _________ c) Uma corda _________ 1.3. Classifica o triângulo [𝐴𝐵𝐶]: a) Quanto aos lados; _________________________________________________ b) Quanto aos ângulos. _________________________________________________ 1.4. Determina, com aproximação às unidades do centímetro quadrado (caderno): a) A área do triângulo [ABC]; b) A área da parte colorida da figura. 2. Na figura seguinte está representada uma circunferência de centro em O. 2.1. Identifica: a) Um diâmetro _____ b) Um raio _____ c) Uma corda _____ d) Um ângulo ao centro _____ 2.2. Pinta na figura um setor circular. 2.3. Desenha na figura uma reta tangente à circunferência no ponto E. Figura 4
  • 2. 3. Determina a área de cada uma das figuras seguintes (caderno). 4. Observa a figura seguinte e indica: 4.1. O comprimento do diâmetro _____ 4.2. O comprimento do raio _____ 4.3. O perímetro do círculo 4.4. A área do círculo 5. Determina o perímetro e a área das figuras (caderno). a) b) c) 6. A figura é formada por um triângulo equilátero e por um semicírculo. O semicírculo tem 12 cm de diâmetro. Determina o perímetro, em centímetros, da figura. Apresenta o resultado arredondado às unidades. 7 cm