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22 February, 01:15

1. Uma escada possui comprimento igual a 30m. Sabe-se que ela se encontra encostada em um muro, formando com este um ângulo de 60º. Podemos afirmar que a altura da escada, em m. é igual am:

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  1. 22 February, 02:16
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    The height of the ladder is 15 meters.

    Step-by-step explanation:

    To find the height of the ladder, we just need to use the cosine relation of the 60 degrees angle.

    The adjacent side to the angle is the height of the ladder, and the hypotenuse of the triangle created is the length of the ladder. So, we have that:

    cos (60) = height / length

    0.5 = height / 30

    height = 30 * 0.5 = 15 meters

    The height of the ladder is 15 meters.
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