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SAT&ACT Math 7 Online
OpenStudy (aripotta):

In triangle TVW below, what is the length of side TW? a. 3sqrt(2) (approximately 4.24) b. 6sqrt(2) (approximately 8.49) c. 6sqrt(3) (approximately 10.39) d. 8 e. 9

OpenStudy (aripotta):

|dw:1416505998731:dw|

OpenStudy (anonymous):

@xo.minnie.xox mum cud u help her?

OpenStudy (opcode):

This requires trigonometry. Ever heard of SOHCAHTOA? @AriPotta

OpenStudy (aripotta):

yes that rings a bell. i heard of that like 3 yrs ago lol. haven't had to use it much so it must have slipped my mind

OpenStudy (aripotta):

not quite sure what it means though, could you explain it?

OpenStudy (opcode):

SOH: \(\sin \theta = \dfrac{opposite}{hypotenuse}\) CAH: \(\cos \theta = \dfrac{adjacent}{hypotenuse}\) TOA: \(\tan \theta = \dfrac{opposite}{adjacent}\) |dw:1416507341673:dw|

OpenStudy (opcode):

We need to find the length of the adjacent side, then we can use the Pythagorean theorem to find the length of the hypotenuse.

OpenStudy (aripotta):

so this is what i have? what do i do? |dw:1416507551464:dw|

OpenStudy (aripotta):

the 45 is in degrees btw

OpenStudy (opcode):

Wait, how did you make that triangle it should be: |dw:1416507699645:dw|

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