Matemática Flashcards

1
Q

soma dos termos de uma PG

A

Sn = a1 (q^n – 1) / q - 1 razão igual a q

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2
Q

soma dos ângulos internos do polígono

A

S=(n-2).180 n=nº de lados

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3
Q

Área do triangulo equilátero

A

A=l².√3 /4

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4
Q

Altura do triangulo equilátero

A

h=l.√3 /2

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5
Q

Formula do x do vértice de uma parábola

A

Xv= -b/2a

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6
Q

Fórmula do y do vértice de uma parábola

A

Yv= -Δ/4a

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7
Q

área do polígono regular qualquer

A

S=p.Ap S - superfície de contato / p - perímetro dividido por 2 / Ap - apótema

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8
Q

Area da coroa da circunferencia

A

A=π(R²-r²)

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