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15.12.2020 •
Mathematics
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Ответ:
The correct answer is ‘‘none of the above’’.
Step-by-step explanation:
The angle formed by perpendicular lines is 90 degrees. According to the definition of perpendicularity, two lines are perpendicular if they meet at a right angle.
The definition of ‘‘right angle’’ tells us that the measure of a right angle is 90 degrees.
It is not difficult to deduce that the other three angles have the same measure. Then, two perpendicular lines form four right angles.