In ΔEFG, e = 2.6 cm, f = 7.2 cm and g=8.3 cm. Find the measure of ∠F to the nearest degree.
2 answers:
Answer:
Step-by-step explanation:
<u>Use the law of cosines:</u>
- cos F = (e² + g² - f²)/2eg
- cos F = (2.6² + 8.3²- 7.2²)/2(2.6)(8.3)
- = 0.5516
- ∠F = arccos 0.5516
- ∠F = 57° (rounded to the nearest degree)
Answer:
57
Step-by-step explanation:
cos F = (e² + g² - f²)/2eg
cos F = (2.6² + 8.3²- 7.2²)/2(2.6)(8.3)
= 0.5516
∠F = arccos 0.5516
∠F = 57° (rounded to the nearest degree)
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