The lengths of the sides of a triangle are 15m, 21m, and 28cm. What is…

The lengths of the sides of a triangle are 15m, 21m, and 28cm. What is the size of the angle facing the side 21m (correct to one decimal place)?
  • A.
    85.7°
  • B.
    47.5°
  • C.
    41.5°
  • D.
    41.4°
  • E.
    38.2°
Correct Answer: Option B
Explanation
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