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Mathematics 9 Online
OpenStudy (anonymous):

find missing angle of triangle a - 1 b - 1 c - 1.41

OpenStudy (anonymous):

OpenStudy (ja1):

We are going to use the Pythagorean Theorem here. Are you familiar with this formula?

OpenStudy (ja1):

Oh wait! The missing angle. My bad I thought it was side :)

OpenStudy (anonymous):

Okay, so 1^2 + 1^2 + 1.41^2 ?

OpenStudy (ja1):

My bad, it's a² = b² + c² - 2ba cosA

OpenStudy (anonymous):

1^2 + 1^2 + 1.41^2 -2 cos 1?

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