Question

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

Answer 1

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 )