In this lecture, we will learn about symmetry. Symmetry means both sides of a shape look the same, like a mirror image. If you fold, flip, or turn a shape and both parts match exactly, it has symmetry. The line of symmetry is an imaginary line that divides a shape into two equal halves it can be vertical, horizontal, or diagonal. There are different types of symmetry: reflective symmetry (mirror image), rotational symmetry (looks the same after turning), point symmetry (matches when turned 180°), and translational symmetry (repeats in a pattern). Shapes like squares have 4 lines of symmetry, rectangles have 2, circles have infinite, while some shapes like scalene triangles have none. Symmetry is also found in nature, like in butterflies, flowers, and the human body.