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3 votes
Thank you it’s Geomtry 9th grade

Thank you it’s Geomtry 9th grade-example-1
User Jahred
by
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1 Answer

4 votes

Explanation:

Just plugging into the equation given

BC^2 = 30^2 + 21^2 - 2 (30)(21) cos 123

BC^2 = 900 + 441 + 1260 cos (123)

BC = 45 units

User Uml
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8.4k points

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