Perpendicular: the trend that's straight up and down, like a boss. This category is all about lines and angles that go against the grain (or rather, against the horizontal). From linear motion to crest and trough, these trends embody a sense of precision and balance that can only be achieved with a little bit of perpendicularity. Equivalence relation and conservative force may be a mouthful to say, but they represent the analytical side of this trend, diving deep into the principles that make perpendicularity so darn satisfying. And for the more visually inclined, shape drawing is the perfect way to explore the artistry of perpendicular lines and angles. So, whether you're a math whiz or a creative genius, get ready to embrace the beauty of (almost) right angles and explore the world of Perpendicular.