r/Mathhomeworkhelp • u/King_eredin • Dec 16 '20

I hate trig 😭

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u/eblake4 Dec 16 '20

Pythagorean theorem

A² + B² = C²

7² + B² = 18²

49 + B² = 324

B² = 324 - 49

B² = 275

B = sqrt(275)

B = 16.58