It is geometry.
27 sq cm
It started off as a study of triangles and is a study of straight lines and angles, as well as relationships between them.
Geometry is all about the study of angles, lines, planes, and shapes
Because trigonometry is concerned with the lines (their lengths) and angles between lines. The latter requires knowledge about their direction.
bro angles hav lines in em
Perpendicular lines meet at right angles
Angles are the points at which lines meet. Sides are the opposite, being the lines that connect at angles.
That is an important theorem in geometry: if two lines intersect to form adjacent congruent angles, then the lines are perpendicular. Those congruent angles would be right angles.
It is called coordinated geometry which is plotted on the Cartesian plane.
intersecting lines * * * * * Non-perpendicular intersecting lines. Or else the angles would be right angles.
Two lines that intersect will create2 pairs of equal angles and if the lines are perpendicular the angles created will be right angles