There are two ways to do so. One way works but the other doesn't.
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yes, it makes four right angles.
perpendicular lines
No; four angles are formed.
yes, perpendicular lines form four right angles its be cuz two lines are intersects
When two lines intersect, the angles across from each other are called vertically opposite angles, or just opposite angles. Opposite angles are equal to one another. See 'related links' below.