3 years ago

Please help me i rlly need it

Mathematics

2 answers:

Yakvenalex [24]3 years ago

5 0

Answer:

im stuck on a similar problem right now

iogann1982 [59]3 years ago

4 0

Answer:

8.2

Step-by-step explanation:

Use cosine law:

BC² = 7² + 9² - 2(7)(9)cos(60)

BC² = 67

BC = sqrt (67)

BC = 8.1853

BC = 8.2 (nearest tenth)

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