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18 September, 09:55

The side length of an equilateral triangle is 20 centimeters. Find the length of altitude of the triangle.

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  1. 18 September, 10:39
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    17.3 cm

    Step-by-step explanation:

    20² = 10² + x²

    400 = 100 + x²

    300 = x²

    x = 17.3 cm
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