Question
In Fig. are the following pairs of angles adjacent? Justify your answer.
$i.$
$ii.$
$iii.$
$iv.$
$i.$
$ii.$
$iii.$
$iv.$
✓
Answer
Two angles are called adjacent angles, if they have a common vertex and common arm but no common interior points.
Hence, $a$ and $b$ form a pair of adjacent angle only in $i.$
Hence, $a$ and $b$ form a pair of adjacent angle only in $i.$
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