Angle bisector - GCSE Maths Definition

An angle bisector is a line or line segment that divides an angle into two equal parts. In the context of GCSE Maths, the angle bisector is particularly useful when solving problems related to triangles and geometry. If a point lies on the angle bisector, it is equidistant from the two sides of the angle. Constructing an angle bisector can involve using a compass and straightedge, and it’s essential for various geometric proofs and constructions, including finding the incenter of a triangle, which is the point where the angle bisectors of a triangle's angles intersect.