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Desafio: Mostre que você se garante mesmo! Sem fazer conta, somente usando duas folhas quadradas e congruentes, determine essa série geométrica!
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Komentar
Desafio geométrico que parece simples, mas exige atenção aos detalhes. O ângulo externo indicado mede 110°. Como ele forma um par linear com o ângulo interno da base do triângulo, calculamos o seu suplementar. Ângulos suplementares somam 180°, portanto 180° − 110° = 70°. Esse ângulo de 70° é um dos ângulos internos do triângulo. Observando as marcações, percebemos que o triângulo é isósceles, pois possui dois lados congruentes. Em um triângulo isósceles, os ângulos da base são congruentes. Log
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Komentar
Começamos observando o triângulo isósceles retângulo da base. Ele tem um ângulo reto de 90° e, como os outros dois lados são congruentes, os outros dois ângulos medem 45° cada. Agora olhe para o ângulo de 45° que está encostado no lado vertical esquerdo. O ângulo externo a ele, formado pela continuação desse lado, é o ângulo suplementar, ou seja, soma 180° com o ângulo interno. Logo, esse ângulo externo mede: 180° − 45° = 135°. Esse ângulo de 135° pertence a um triângulo isósceles, indicado pe
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