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Mathematics 9 Online
OpenStudy (anonymous):

Find X

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|

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?

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..

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