Investigate what happens to the equation of different lines when you translate them. Try to predict what will happen. Explain your findings.
In how many ways can you fit all three pieces together to make shapes with line symmetry?
Investigate what happens to the equations of different lines when you reflect them in one of the axes. Try to predict what will happen. Explain your findings.
Two circles of equal radius touch at P. One circle is fixed whilst the other moves, rolling without slipping, all the way round. How many times does the moving coin revolve before returning to P?
A red square and a blue square overlap so that the corner of the red square rests on the centre of the blue square. Show that, whatever the orientation of the red square, it covers a quarter of the. . . .
Can you find a way to turn a rectangle into a square?
There are nine teddies in Teddy Town - three red, three blue and three yellow. There are also nine houses, three of each colour. Can you put them on the map of Teddy Town according to the rules?
Draw a square. A second square of the same size slides around the first always maintaining contact and keeping the same orientation. How far does the dot travel?
Show how this pentagonal tile can be used to tile the plane and describe the transformations which map this pentagon to its images in the tiling.
L triominoes can fit together to make larger versions of themselves. Is every size possible to make in this way?
How did the the rotation robot make these patterns?
Use the applet to explore the area of a parallelogram and how it relates to vectors.
Is there a relationship between the coordinates of the endpoints of a line and the number of grid squares it crosses?
It would be nice to have a strategy for disentangling any tangled ropes...
Mr McGregor has a magic potting shed. Overnight, the number of plants in it doubles. He'd like to put the same number of plants in each of three gardens, planting one garden each day. Can he do it?
Can you decide whether two lines are perpendicular or not? Can you do this without drawing them?
Explore the area of families of parallelograms and triangles. Can you find rules to work out the areas?
Using a ruler, pencil and compasses only, it is possible to construct a square inside any triangle so that all four vertices touch the sides of the triangle.
Move the corner of the rectangle. Can you work out what the purple number represents?
The farmers want to redraw their field boundary but keep the area the same. Can you advise them?
There are lots of ideas to explore in these sequences of ordered fractions.
The number of plants in Mr McGregor's magic potting shed increases overnight. He'd like to put the same number of plants in each of his gardens, planting one garden each day. How can he do it?
Triangular numbers can be represented by a triangular array of squares. What do you notice about the sum of identical triangle numbers?
A right-angled isosceles triangle is rotated about the centre point of a square. What can you say about the area of the part of the square covered by the triangle as it rotates?
Medieval stonemasons used a method to construct octagons using ruler and compasses... Is the octagon regular? Proof please.
How well can you estimate angles? Playing this game could improve your skills.
If you continue the pattern, can you predict what each of the following areas will be? Try to explain your prediction.
Triangle ABC has equilateral triangles drawn on its edges. Points P, Q and R are the centres of the equilateral triangles. What can you prove about the triangle PQR?
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?
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the dot affects its vertical and horizontal movement at each stage.
Can you make sense of these three proofs of Pythagoras' Theorem?
A circle rolls around the outside edge of a square so that its circumference always touches the edge of the square. Can you describe the locus of the centre of the circle?
The points P, Q, R and S are the midpoints of the edges of a non-convex quadrilateral.What do you notice about the quadrilateral PQRS and its area?
Ask a friend to choose a number between 1 and 63. By identifying which of the six cards contains the number they are thinking of it is easy to tell them what the number is.
Use the applet to make some squares. What patterns do you notice in the coordinates?
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the red dot affects the distance it travels at each stage.
An environment that enables you to investigate tessellations of regular polygons
Arrange the four number cards on the grid, according to the rules, to make a diagonal, vertical or horizontal line.
A tilted square is a square with no horizontal sides. Can you devise a general instruction for the construction of a square when you are given just one of its sides?
What is the relationship between the angle at the centre and the angles at the circumference, for angles which stand on the same arc? Can you prove it?
Can you make a right-angled triangle on this peg-board by joining up three points round the edge?
Can you find triangles on a 9-point circle? Can you work out their angles?
Experiment with the interactivity of "rolling" regular polygons, and explore how the different positions of the red dot affects its speed at each stage.
Can you put the 25 coloured tiles into the 5 x 5 square so that no column, no row and no diagonal line have tiles of the same colour in them?
What can you say about the values of n that make $7^n + 3^n$ a multiple of 10? Are there other pairs of integers between 1 and 10 which have similar properties?
Use these four dominoes to make a square that has the same number of dots on each side.
Position the lines so that they are perpendicular to each other. What can you say about the equations of perpendicular lines?
How does the position of the line affect the equation of the line? What can you say about the equations of parallel lines?
How good are you at estimating angles?