Locus/loci

  • Symmetric Trace
    problem

    Symmetric Trace

    Age
    14 to 16
    Challenge level
    3 out of 3
    Points off a rolling wheel make traces. What makes those traces have symmetry?
  • Making Spirals
    problem

    Making Spirals

    Age
    7 to 11
    Challenge level
    3 out of 3

    Can you make a spiral for yourself? Explore some different ways to create your own spiral pattern and explore differences between different spirals.

  • A black goat with horns and white facial markings.
    problem

    The Old Goats

    Age
    11 to 14
    Challenge level
    1 out of 3

    A rectangular field has two posts with a ring on top of each post. There are two quarrelsome goats and plenty of ropes which you can tie to their collars. How can you secure them so they can't fight each other but can reach every corner of the field?

  • Rolling Triangle
    problem

    Rolling Triangle

    Age
    11 to 14
    Challenge level
    3 out of 3

    The triangle ABC is equilateral. The arc AB has centre C, the arc BC has centre A and the arc CA has centre B. Explain what happens when this shape rolls along with a plank of wood on top of it.

  • Where am I?
    problem

    Where Am I?

    Age
    11 to 16
    Challenge level
    1 out of 3

    From the information you are asked to work out where the picture was taken. Is there too much information? How accurate can your answer be?

  • Roaming Rhombus
    problem

    Roaming Rhombus

    Age
    14 to 16
    Challenge level
    1 out of 3

    We have four rods of equal lengths hinged at their endpoints to form a rhombus ABCD. Keeping AB fixed we allow CD to take all possible positions in the plane. What is the locus (or path) of the point D?

  • Just rolling round
    problem

    Just Rolling Round

    Age
    14 to 16
    Challenge level
    3 out of 3

    P is a point on the circumference of a circle radius r which rolls, without slipping, inside a circle of radius 2r. What is the locus of P?

  • Set Square
    problem

    Set Square

    Age
    16 to 18
    Challenge level
    1 out of 3

    A triangle PQR, right angled at P, slides on a horizontal floor with Q and R in contact with perpendicular walls. What is the locus of P?

  • Mach Attack
    problem

    Mach Attack

    Age
    16 to 18
    Challenge level
    1 out of 3

    Have you got the Mach knack? Discover the mathematics behind exceeding the sound barrier.

  • Pole vaulting
    problem

    Pole Vaulting

    Age
    16 to 18
    Challenge level
    1 out of 3

    Consider the mechanics of pole vaulting