matemática Flashcards

1
Q

FÓRMULAS

número de diagonais

soma dos ângulos internos

soma dos ângulos externos

A

d = n (n-3) / 2

Si = (n-2) 180

Se = 360

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2
Q

sen(2x)

cos(2x)

A

sen(2x) = 2 senx cosx

cos(2x) = cos^2 x - sen^2 x

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3
Q

log2
log3
log5

A
log2 = 0,3
log3 = 0,5
log5 = 0,7
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4
Q

indique se é endo ou exo:
🔼Hform

🔼Hquebra

A

🔼Hform -> exo

🔼Hquebra -> endo

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5
Q

termo geral da PA

soma de termos da PA

A

[ver caderno]

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6
Q

termo geral da PG
soma de termos da PG
soma infinita da PG

A

[ver caderno]

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7
Q

como saber se é SPD, SPI e SI?

A

SPD
det ≠ zero

SPI
det = zero , detX = zero , detY = zero

SI
det = zero , detX ≠ zero , detY ≠ zero

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8
Q

o que é sistema homogêneo?

o que ele nunca pode ser?

A
  • termos independentes são iguais a ZERO

- nunca pode ser SI

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9
Q

3 fórmulas de ângulo

A

[ver caderno]

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10
Q

duas fórmulas de esfera

A

A = 4 • pi • R^2

V = 4 • pi • R^3 / 3

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11
Q

duas fórmulas de cone

A

ângulo = 2 • pi • R / g

Alateral = Pi • R • g

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12
Q

4 triângulo retângulo decorados

A

3 4 5
5 12 13
8 15 17
7 24 25

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13
Q

teorema de tales

A

ft dia 5 jun

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14
Q

baricentro

A

encontro das medianas

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15
Q

circuncentro

A

encontro das mediatrizes

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16
Q

incentro

A

encontro das bissetrizes

17
Q

circunferencia inscrita em quadrilatero, qual a relacao entre os lados?

A

ft dia 5 jun

18
Q

hierarquia dos quadrilateros

A

quadrilateros
trapezio
paralelogramo
losango e retangulo

19
Q

area do losango

A

A=D•d/2

20
Q

area do triangulo com circunf inscrita

A

A = p • R

21
Q

area do triangulo com circunf circunscrita

A

A = a • b • c / 4r