An account of multiplication of vectors, both scalar products and vector products.

A quadrilateral changes shape with the edge lengths constant. Show the scalar product of the diagonals is constant. If the diagonals are perpendicular in one position are they always perpendicular?

The article provides a summary of the elementary ideas about vectors usually met in school mathematics, describes what vectors are and how to add, subtract and multiply them by scalars and indicates. . . .

Can you combine vectors to get from one point to another?

This problem in geometry has been solved in no less than EIGHT ways by a pair of students. How would you solve it? How many of their solutions can you follow? How are they the same or different?. . . .

Use vectors to collect as many gems as you can and bring them safely home!

As a quadrilateral Q is deformed (keeping the edge lengths constnt) the diagonals and the angle X between them change. Prove that the area of Q is proportional to tanX.

Form a sequence of vectors by multiplying each vector (using vector products) by a constant vector to get the next one in the seuence(like a GP). What happens?

Charlie likes to go for walks around a square park, while Alison likes to cut across diagonally. Can you find relationships between the vectors they walk along?

Can you find the area of a parallelogram defined by two vectors?

Explore the lattice and vector structure of this crystal.

Go on a vector walk and determine which points on the walk are closest to the origin.

Can you work out the fraction of the original triangle that is covered by the green triangle?

Explore the meaning behind the algebra and geometry of matrices with these 10 individual problems.

Find the distance of the shortest air route at an altitude of 6000 metres between London and Cape Town given the latitudes and longitudes. A simple application of scalar products of vectors.

This article looks at knight's moves on a chess board and introduces you to the idea of vectors and vector addition.

Starting with two basic vector steps, which destinations can you reach on a vector walk?

Stick some cubes together to make a cuboid. Find two of the angles by as many different methods as you can devise.

Can you make matrices which will fix one lucky vector and crush another to zero?

A visualisation problem in which you search for vectors which sum to zero from a jumble of arrows. Will your eyes be quicker than algebra?

An account of how mathematics is used in computer games including geometry, vectors, transformations, 3D graphics, graph theory and simulations.