triângulos Flashcards

1
Q

condição de existência

A

em um triângulo, qualquer lado deve ser menor que a soma dos outros 2

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2
Q

equilátero

A

3 lados iguais

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3
Q

isosceles

A

2 lados iguais

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4
Q

escaleno

A

3 lados diferentes

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5
Q

retangulo

A

a² = b² + c²

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6
Q

acutângulo

A

a² < b² + c²

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7
Q

obtusangulo

A

a² > b² + c²

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8
Q

soma dos ângulos internos de um triângulo

A

Si = 180

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9
Q

soma dos angulos externos

A

Se =360

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10
Q

baricentro

A

ponto de encontro das 3 medianas

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11
Q

ortocentro

A

ponto de união entre as 3 alturas do triângulo

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12
Q

incentro

A

ponto de intersecção das 3 bissetrizes (divide o angulo no meio) de um triângulo

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13
Q

circuncentro

A

ponto de intersecção entre as 3 mediatrizes (reta que passa perpendicularmente ao ponto médio)

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14
Q

dois lados e o ângulo entre eles formula p descobrir a area

A

A= a × b × sen / 2

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15
Q

sen 120 = sen de?

A

60

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16
Q

Area semiperimetro e apotema

A

A= semiperimetro × apotema

17
Q

semiperimetro

A

soma dos lados/ 2