2 years ago

What is the length of side x? Round your answer to the nearest whole number.

Mathematics

1 answer:

liberstina [14]2 years ago

5 0

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 = $\sqrt{5626-5610cos61}$ ≈ 54 cm ( to the nearest whole number )

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