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Komok [63]
2 years ago
14

How to find the missing values for each 45,45,90 o 30,60,90 triangle

Mathematics
1 answer:
Sedaia [141]2 years ago
4 0
All three numbers have to have a equal multiple.
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Para recortar algumas figuras geométricas, um aluno utilizou uma cartolina com 1mx0,8m. Sabendo que ele recortou 2 triângulos, a
Gnom [1K]

Answer:

7190 cm²

Step-by-step explanation:

Para recortar algumas figuras geométricas, um aluno utilizou uma cartolina de 1 m x 0,8m.

Passo 1

Determine a área de todo o papelão

= Temos dimensões = 1mx0,8m

Área = Comprimento × Largura

= 0,8m²

Nós convertemos para cm²

1 m² = 10.000 cm²

0,8m² = x cm²

Multiplicação cruzada

0,8m² × 10.000 cm² / 1 m²

= 8000 cm²

Passo 2

Sabendo que recortou 2 triângulos, ambos com 20cm de base e 30cm de altura

Encontramos a área de um triângulo

= 1/2 × base × altura

= 1/2 × 20 × 30

= 300cm²

Ele cortou 2 triângulos Portanto, o são dos dois triângulos = 300cm² × 2

= 600cm²

etapa 3

Ele também cortou 2 trapézios ambos com bases de 10cm e 20cm e altura de 7cm.

A área de um trapézio =

1/2 (a + b) h

= 1/2 (10cm + 20cm) × 7cm

= 1/2 × 30 × 7

= 105 cm²

Ele cortou dois trapézios, portanto

A área dos dois trapézios do corte = 105cm² × 2

= 210 cm²

Passo 4

A área total do papelão que foi cortado = 600cm² + 210cm²

= 810 cm²

Etapa 5

Determine em cm² quanto de papelão sobrou.

Isso é calculado como:

Área total do papelão - Área total que foi cortada

= 8000 cm² - 810 cm²

= 7190 cm²

5 0
3 years ago
The world's largest pumpkin pie weighed 2020 pounds. The pie was 12 and one-third feet across and one-third foot thick. Write a
Yanka [14]

Answer:

\frac{1}{3} = \frac{2}{6}

To find equivalent fractions, multiply be any number that is the same for the numerator/denominator

You can also divide, but it must be divisible by both the numerator/denominator

5 0
3 years ago
Which of the following statements is not correct?
NeX [460]

Answer:

The highest percentage of teenagers in the sample

listed soccer as their favorite sport.

Basketball

Lacrosse

Soccer

Football

Step-by-step explanation:

4 0
2 years ago
Read 2 more answers
The value of -4/5 + 9/20 is
Kisachek [45]
-4/5+9/20=-16/20+9/20=-7/20
4 0
3 years ago
What does 12 ÷3/4 equal? ​
djyliett [7]

Answer:

16.

Hope this helps, have a great day/night!

5 0
3 years ago
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