Question

4. Two intersecting lines are perpendicular if the angle between them is 90°​

Answer 1

Answer:

Step-by-step explanation:

In elementary geometry, the property of being perpendicular (perpendicularity) is the relationship between two lines which meet at a right angle (90 degrees). The property extends to other related geometric objects. A line is said to be perpendicular to another line if the two lines intersect at a right angle.'

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Answer 2

Step-by-step explanation:

if one angle will be 90° then other three angles formed on the centre when two lines intersect each other will also be 90° ( through linear pair).

90° + angle x= 180°

and also through vertically opposite angle