anonymous
  • anonymous
Find the value of x. Express your answer in simplest radical form.
Mathematics
katieb
  • katieb
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anonymous
  • anonymous
|dw:1439557302862:dw|
Nnesha
  • Nnesha
apply Pythagorean theorem
Nnesha
  • Nnesha
a^2+b^2=c^2

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Nnesha
  • Nnesha
c= longest side (hypotenuse)
anonymous
  • anonymous
so 25=a^2 + b^2?
Nnesha
  • Nnesha
yes a= ?? b= ??
Nnesha
  • Nnesha
|dw:1439557496518:dw|
anonymous
  • anonymous
so 5?
UsukiDoll
  • UsukiDoll
is there one x we need to find or 2?
anonymous
  • anonymous
i think just x …cuz the sides are equal
Nnesha
  • Nnesha
c= 5 a=x and b= x 45-45-90 triangle has two equal sides
UsukiDoll
  • UsukiDoll
strange.. usually we have 2 sides and 1 unknown? or has it been too long since I've seen a problem like this?
anonymous
  • anonymous
ya… i was thinking maybe of using sohcantoa somehow??
UsukiDoll
  • UsukiDoll
can you post a screenshot of this problem?
anonymous
  • anonymous
i can’t on an iPad..i tried.. but i drew exactly what they gave me
anonymous
  • anonymous
would it be 5* sin(45)?
Nnesha
  • Nnesha
what's the subject you working on ?
anonymous
  • anonymous
geometry
Nnesha
  • Nnesha
have you learned sin cos
anonymous
  • anonymous
ya kind of
anonymous
  • anonymous
i did sin45=opposite/5 then 5* sin45…
Nnesha
  • Nnesha
|dw:1439558158478:dw| both sides are same i guess you have to use sin
Nnesha
  • Nnesha
yes then solve for x
anonymous
  • anonymous
ya cuz 3.5^2 +3.5^2=24.5
anonymous
  • anonymous
so then x=3.5 ?
Nnesha
  • Nnesha
yeah you can round it to 25
Nnesha
  • Nnesha
so \[(3.5)^2+(3.5)^2 =5^2\]
anonymous
  • anonymous
thanks!
Nnesha
  • Nnesha
my pleasure!

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