Question

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Answer 1

Answer:

1. in figure (I), the value of angle x is equal to 70°(i.e. 30°+40°=70°)
2. in figure (ii) the the value of angle x is 40 °(.i.e.75°-35°=40°)
3. in figure (ii), the value of angle x is 90° .(i.e. 60 ° + 30 °=90°)

Step-by-step explanation:

All the above operations are done on the basis of triangle 's angle property that states that sum of two adjacent angles will be equal to its opposite exterior angles .

corollary , in figure ( ii),The exterior angle is subtracted from the opposite interior angle to get its adjacent interior angle.