1. Find the value of the unknown exterior angle x in the following diagrams:

            

Answers (1)

As we know that the exterior angle is equal to the sum of the opposite internal angles. So, 

i) x=50^0+70^0=120^0

ii) x=65^0+45^0=110^0

iii) x=30^0+40^0=70^0

iv) x=60^0+60^0=120^0

v) x=50^0+50^0=100^0

vi) x=30^0+60^0=90^0

 

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