Vertices points of intersection of edges of a polyhedron are known as its vertices.

Edges line segments common to intersecting faces of a polyhedron are known as its edges.

Faces polygons forming a polyhedron are known as its faces.

Adjacent vertices the end-points of the same side of a polygon are known as the adjacent vertices.

ADJACENT VERTICES The end-point of the same sides of a polygon are known as the adjacent vertices.

The number of edges of a polyhedron, which has 7 faces and 10 vertices, is

The area of a parallelogram is 12 square units. Two of its vertices are the points A (-1, 3) and B (-2, 4) . Find the other two vertices of the parallelogram, if the point of intersection of diagonals lies on x-axis on its positive side.

The area of a parallelogram is 12 square units. Two of its vertices are the points A (-1, 3) and B (-2, 4) . Find the other two vertices of the parallelogram, if the point of intersection of diagonals lies on x-axis on its positive side.

Medians the line segments joining the vertices to the mid-points of the opposite side of a triangle are known as its medians.

A(-3, 5) and B(1, 7) are two consecutive vertices of a parallelogram. If the point of intersection of its diagonals be (1, 1), then find its other two vertices.

The point of intersection of diagonals of a square ABCD is at the origin and one of its vertices is at a(4,2). What is the equation of the diagonal BD?