Respuesta :

Answer:

x ≈ 54 cm

Step-by-step explanation:

using the Cosine rule in the triangle

x² = 55² + 51² - (2 × 55 × 51 × cos61° )

   = 3025 + 2601 - 5610cos61°

   = 5626 - 5610cos61°

x = [tex]\sqrt{5626-5610cos61}[/tex] ≈ 54 cm ( to the nearest whole number )

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