Mathematics workshop
Shapes and space
Recognise shapes, rotate pieces, move on a grid and measure a boundary.
Theory
Recognise a shape after a turn
A triangle has three straight sides and a closed outline. A quadrilateral has four. A rectangle also has four right angles: a square qualifies too. Turning a shape keeps these properties. A gap or a curved side changes the shape.
Choose all the triangles.
A whole made from two-cell pieces
Each piece covers exactly two neighbouring cells. Choose a piece, turn it if needed, then choose its starting cell. You can move a placed piece. The whole is complete when each light cell is covered once, without gaps or overlaps.
Build the whole from four pieces.
Choose a piece, then a cell. You can move placed pieces.
Directions on a grid
One step moves across a side to the next cell. Right and left change the column; up and down change the row. Start at the house and follow the instructions in order. The trail shows steps already taken. Undo returns one step.
Follow the route from the house in order.
- right
- right
- up
The length around a shape: perimeter
Perimeter is the length of a shape’s boundary. Here one cell side is one model unit. Mark every outside unit edge once. An edge between two filled cells lies inside the shape and does not count towards its perimeter.
Mark the unit edges around the shape. Leave inside edges unselected.
Unit edges marked:
Practice
Try different ways. Undo a step or start again when you need to.
Choose an activity
Small shapes, routes of 3–5 steps
Choose all the triangles.
Games
Build your answer and choose Check. Ask for a hint if you need one.
Choose an activity
Small shapes, routes of 3–5 steps
Choose all the triangles.