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Question

Find the value of the unknown exterior angle x in the following diagrams :
1114060_1a2077548bc143889316e731582f3f0e.PNG


Solution

As we know that exterior angle is the sum of interior opposite angles.
Therefore
(i) $$x = 50° + 70° = 120°$$
(ii) $$x = 65° + 45° = 110°$$
(iii) $$x = 40° + 30° = 70°$$

Mathematics

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