2 lines passing through each other making exactly four 90 degree angles
Ramanujuan
Is most needed in activities that requires a lot of inquisitive thinking like reading mathemathical theories and scientific formula
perpendicular
A cylinder itself is not described as "perpendicular" because that term refers to the relationship between two lines or planes. However, the axis of a cylinder can be perpendicular to its base. In a right circular cylinder, the axis is perpendicular to the circular bases, meaning the sides of the cylinder rise straight up from the bases at a 90-degree angle.
Mutually Perpendicular
Lines that intersect each other at right angles are called perpendicular lines
Perpendicular lines are two lines that intersect to form four right angles.
In geometric terms, one line is said to be perpendicular to another when their angle of intersection is 90°
It is the orthocentre.
There are multiple meanings for the word "perp". Colloquially, in the United States and other countries, the term refers to a perpetrator or criminal. The term can also mean perpendicular.
The lines are perpendicular.
Circumcenter