Questão de PET - (Banco de itens) Sejam os triângulos T1 e T2 semelhantes

6 – (Banco de itens) Sejam os triângulos T1 e T2 semelhantes. Se a relação entre suas áreas S1/S2 = 16, a relação entre os perímetros P1/P2 é:

a) 4.

b) 8.

c) 16.

d) 256.

RESPOSTA:

Questão de PET - (Banco de itens) Em uma praça, há dois canteiros em forma de triângulo

5 – (Banco de itens) Em uma praça, há dois canteiros em forma de triângulo, como mostra a figura, onde os lados MN e PQ são paralelos. Sabe-se que a medida do lado OQ é igual ao triplo da medida do lado OM, e que a área do triângulo menor é igual a 10 m²

Desse modo, a área, em metros quadrados, do triângulo maior é igual a

a) 30.

b) 60.

c) 70.

d) 90.

RESPOSTA:

Questão de PET - (Banco de itens) Os triângulos ABC e EFG são semelhantes

4 – (Banco de itens) Os triângulos ABC e EFG são semelhantes, AB = 3 cm e EH = 4,5 cm.

a) 1

b) 2/3

c) 1/3

d) 1/4

RESPOSTA:

Questão de PET - (Banco de itens) Na figura, todos os triângulos são equiláteros e o triângulo BMC

3 – (Banco de itens) Na figura, todos os triângulos são equiláteros e o triângulo BMC tem 10 cm² de área.

Os pontos B e C são os pontos médios de AD e AE, respectivamente. Os pontos D e E são, respectiva-

mente, os pontos médios de AF e AL. Já os pontos M e K são os pontos médios de DE e FL, respectivamente.

Desse modo, a área da figura colorida de cinza é, em centímetros quadrados, igual a

a) 50.

b) 60.

c) 70.

d) 90.

RESPOSTA:

Questão de PET - (Banco de itens) Dois triângulos retângulos T1 e T2 são semelhantes

2 – (Banco de itens) Dois triângulos retângulos T1 e T2 são semelhantes. A medida da hipotenusa de T1 é o triplo da medida da hipotenusa de T2. Com relação a esses dois triângulos, são feitas as seguintes afirmativas, que podem ser verdadeiras ou falsas. Classifique-as.

I. O perímetro de T1 é três vezes o perímetro de T2

II. A área de T1é nove vezes a área de T2

.Com relação a essas afirmativas, é correto afirmar que

a) ambas são verdadeiras.

b) ambas são falsas.

c) somente I é verdadeira.

d) somente II é verdadeira.

RESPOSTA:

Questão de PET - (Banco de itens) Os triângulos da figura são semelhantes e a razão entre eles é dada

1 – (Banco de itens) Os triângulos da figura são semelhantes e a razão entre eles é dada por AB/DE = 5/3 . Se a área do triângulo ABC é 75 m², qual é a área do triângulo DEF?

a) 27m²

b) 45m²

c) 125m²

d) 208m²

RESPOSTA:

Questão - Qual propriedade da água e do álcool torna possível separar esses dois líquidos? Qual é o nome desse tipo de separação?

• Qual propriedade da água e do álcool torna possível separar esses dois líquidos? Qual é o nome desse tipo de separação?

Resposta: A propriedade da água e do álcool que torna possível a separação das duas substâncias é o ponto de ebulição. O tipo de separação usada neste caso é a destilação simples. 

Questão de PET - (Banco de itens) Na figura abaixo, o ponto D pertence ao lado BC do triângulo ABC

6 – (Banco de itens) Na figura abaixo, o ponto D pertence ao lado BC do triângulo ABC. Sabe-se que ED é paralelo ao segmento AC, BD = 2 cm, DC = 4 cm e AB = 7 cm. A medida do segmento AE é igual a

a) 7/2 cm.

b) 4 cm.

c) 14/3cm.

d) 5 cm.

RESPOSTA:

Questão de PET - (Banco de itens) Um lote no formato de um triângulo, retângulo em A

5 – (Banco de itens) Um lote no formato de um triângulo, retângulo em A, está representado na figura e todas as medidas indicadas estão em metros. O dono desse lote construirá uma cerca, indicada pelo segmento DE, para instalar um canil. O canil também terá o formato triangular, retângulo em E, conforme representado na figura. O comprimento do segmento DE, que indica a cerca necessária para delimitar a referida área, é, em metros, igual a:

a) 12.

b) 15.

c) 23.

d) 36.

RESPOSTA:

Questão de PET - Uma casa com 3,6 m de altura projeta no solo, em certo instante, uma sombra de 2,4 m

4 – Uma casa com 3,6 m de altura projeta no solo, em certo instante, uma sombra de 2,4 m, conforme o esquema a seguir. No mesmo instante, um poste projeta no solo uma sombra de 4,0 m.

Qual a altura h, desse poste, em metros?

a) 5,2.

b) 5,5.

c) 6,0.

d) 6,4.

RESPOSTA:

Questão de PET - (Banco de itens) Na figura abaixo, os triângulos ABC e XYZ

3 – (Banco de itens) Na figura abaixo, os triângulos ABC e XYZ possuem dois pares de ângulos congruentes, indicados por cores iguais.

A medida do segmento XZ, em centímetros, é

a) 24/5

b) 20/3

c) 48/5

d) 9

RESPOSTA:

Questão de PET - (Banco de itens) Na figura, estão representadas cinco praças e as ruas que ligam essas praças

2 – (Banco de itens) Na figura, estão representadas cinco praças e as ruas que ligam essas praças, formando dois triângulos, ABC e EDC. Sabe-se que os segmentos AB e DE são paralelos, AB = 800 m, DE = 1 000 m, DC = 500 m e EC = 600 m.

Artur partiu do ponto A e, passando pelos pontos  B, C, E, D, C, nessa ordem, retornou ao ponto A. Nesse percurso, Artur caminhou o equivalente a

a) 3 780 m.                                                                              b) 3 925 m.                                                                              c) 4 050 m.                                                                              d) 4 275 m.

RESPOSTA:

Questão de PET - (Banco de itens) Duas escadas estão apoiadas no chão e, cada uma, pelo topo

1 – (Banco de itens) Duas escadas estão apoiadas no chão e, cada uma, pelo topo, a um muro vertical, ambas formando o mesmo ângulo com o chão, conforme mostra a figura. Sabe-se que a escada menor tem 5 m e que, a maior, tem 8 m de comprimento. Além disso, o muro mais baixo tem 3 m de altura. A altura, em metros, do muro mais alto é:

a) 4,4.

b) 4,8.

c) 5,6.

d) 6,2.

RESPOSTA:

Adjectives that start with Z

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Adjectives that start with Y

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Adjectives that start with X

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Adjectives that start with W

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Adjectives that start with V

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Adjectives that start with U

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Adjectives that start with T

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Adjectives that start with S

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Adjectives that start with R

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Adjectives that start with Q

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Adjectives that start with P

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Adjectives that start with O

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Adjectives that start with N

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Adjectives that start with M

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Adjectives that start with L

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Adjectives that start with K

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