Yes. They do.
I disagree with the answer above, no they do not > that is 2 intersecting lines and there are only 2 angles there so the person above it incorrect
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Intersecting lines
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Yes, being that perpendicular lines are by definition intersecting lines forming four 90 degree (right) angles.
Right angles are formed by perpendicular lines. If the lines would extend, to make two intersecting lines, they would form four right angles. Perpendicular lines are written like this: . From its shape, you can already tell that it forms at least two right angles.
Perpendicular lines