Mathematics
12 Online
OpenStudy (anonymous):
solve for right triangle ABC with the given parts a=6, b=7
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (fibonaccichick666):
Can you draw a picture to start please?
OpenStudy (anonymous):
|dw:1397874973149:dw|
OpenStudy (fibonaccichick666):
Good, so now, what theorem do we know about right triangles?
OpenStudy (fibonaccichick666):
Hint: it is very famous
OpenStudy (anonymous):
the Pythagorean theorem
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (fibonaccichick666):
good and what is the pythagorean theorem?
OpenStudy (anonymous):
\[a ^{2} + b ^{2} =c ^{2}\]
OpenStudy (fibonaccichick666):
alright, and what does c represent?
OpenStudy (anonymous):
the hypotenuse
OpenStudy (fibonaccichick666):
good so now, can you input your values into the pythagorean thm?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
\[7^{2} + 6^{2} = c ^{2}\]
OpenStudy (fibonaccichick666):
good, so now, can you simplify the left side?
OpenStudy (anonymous):
49+36=[c ^{2}\]
OpenStudy (fibonaccichick666):
good good now combine like terms
OpenStudy (anonymous):
\[85=c ^{2}\]
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
\[\sqrt{85}=\sqrt{c}\]
OpenStudy (fibonaccichick666):
check that last step
OpenStudy (anonymous):
\[\sqrt{85}=C ^{2} \] ?
OpenStudy (anonymous):
that one?
OpenStudy (fibonaccichick666):
Yea, that step is not correct
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (fibonaccichick666):
so you are taking the square root of both sides right?
OpenStudy (anonymous):
yeah
OpenStudy (fibonaccichick666):
so can you tell me what the square root of something squared is?
OpenStudy (anonymous):
i dont know but i thought it would cancel out as in
\[\sqrt{85} = \sqrt{C ^{2}}\]
OpenStudy (anonymous):
and then
\[\sqrt{85} = C\]
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (fibonaccichick666):
yep, that is right now
OpenStudy (anonymous):
but how can i get \[\sqrt{85}\]
OpenStudy (fibonaccichick666):
oh that's the answer, unless you want to try and simplify it, but I'd just leave that as is
OpenStudy (anonymous):
oh ok so then am i supposed to solve for the angles
OpenStudy (fibonaccichick666):
Well, I mean you could if you have learned the trig functions, but usually it just means to find all of the sides
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
yeah i did but im confused on how to solve for the angles
OpenStudy (fibonaccichick666):
well, what is the definition of tangent?
OpenStudy (anonymous):
opposite over adjacent
OpenStudy (fibonaccichick666):
good so label the angles A and B, what is tan A? tanB?
OpenStudy (anonymous):
but how will i know what is the opposite or adjacent when im not given any other number
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (fibonaccichick666):
oh just label whichever you want A and the other B, that's all the info you require
OpenStudy (anonymous):
oh ok
OpenStudy (fibonaccichick666):
did you get it?
OpenStudy (anonymous):
lol....no
OpenStudy (fibonaccichick666):
show me your work?
Join the QuestionCove community and study together with friends!
Sign Up
OpenStudy (anonymous):
|dw:1397877670457:dw|