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OpenStudy (anonymous):
Nnesha (nnesha):
hmm not sure but i guess x is half of that angle ?
OpenStudy (anonymous):
My answer options are 110, 145, and 220
Nnesha (nnesha):
thn nvm ;d
OpenStudy (campbell_st):
well here is a simple solution with some facts... |dw:1431307535090:dw|
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OpenStudy (anonymous):
I know that. i just dont see how to set up the equation
OpenStudy (campbell_st):
so 2 angles = 90, 1 angle = 70
x = 360 - 90 - 90 - 70
OpenStudy (anonymous):
Why 360? Why not set it up as m angle 70= 1/2(x-x)?
Nnesha (nnesha):
becuz full circle add up to 360 degree ;-)
OpenStudy (anonymous):
Oh. So do I do that with all of the other questions? Or how does it habe to be set up to make it 360?
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Nnesha (nnesha):
it depends on the question i guess becuz sometimes given is arc length and we need to find an angle
OpenStudy (anonymous):
Oh. Okay.
OpenStudy (campbell_st):
the reason I used 360 is that I constructed a kite|dw:1431374836744:dw|
the angle sum of a kite is 360. So the missing angle at the centre is 360 - the known angles.
and form there you should realise, the angle at the centre is the angle that forms the arc..