In geometry, a diagonal is a line segment joining two vertices of a polygon or polyhedron, when those vertices are not on the same edge. Informally, any sloping line is called diagonal.

Since they are three-dimensional figures, they have body diagonals (space diagonals) and face diagonals. The number of diagonals and their properties vary for different solids, based on the …

A diagonal is a line segment connecting the opposite vertices or the non-adjacent vertices of a polygon. Learn about the diagonals of polygons, examples, & more.

A polygon 's diagonals are line segments from one corner to another (but not the edges). The number of diagonals of an n-sided polygon is: an octagon has 8 (8−3)/2 = 8×5/2 = 20 …

Jul 24, 2025 · Diagonals in math are defined only for lateral shapes, or the shapes that have corners, such as Squares, Rectangles, Pentagons, etc. but they are not defined for curved …

For a polyhedron, a diagonal is a line segment joining two vertices that are in different faces. The end points of the diagonal share no common edges or faces. These diagonals are sometimes …

Learn about diagonals in geometry, including their definition as lines connecting non-adjacent vertices in polygons. Explore formulas for calculating diagonal counts, lengths in squares and …

In simple words, diagonals are "slanting lines" that go across the shape instead of sticking to the edges. You’ll find this concept used while counting lines inside polygons, calculating areas and …

Learn about diagonals in geometry: definition, diagonal formulas, number of diagonals in polygons, and practice with quizzes. Perfect for K-5 students.

May 16, 2025 · Dive into geometric diagonals with this comprehensive guide covering definitions, essential properties, derivations of formulas, and real-world applications across shapes.