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(a) Find x + y + z

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(a) Find x + y + z

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(a) Find x + y + z

z+30\degree=180\degree

z=150\degree

x+90\degree=180\degree

x=90\degree

Sum of all angles of triangle is 180\degree

the unmarked angle of triangle be A.A+90\degree+30\degree=180\degree

                                                                   A=180\degree-120\degree

                                                                   A=60\degree

 

A+y=180\degree

60\degree+y=180\degree

y=180\degree - 60\degree

y=120\degree

x + y + z = 90\degree+120\degree+150\degree

x + y + z = 360\degree

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