Perimeter and area
Pages
Perimeter
The distance round a shape.
Area of a rectangle
Area as the squares a shape covers.
Area of a triangle
Half of base times height.
Area of a parallelogram
Base times perpendicular height.
Area of a trapezium
Half the sum of the parallel sides times the height between them.
Finding a length from an area
Running an area formula backwards to recover a base.
Perimeter and area of composite shapes
Splitting a compound shape into rectangles and triangles, or subtracting a hole.
Practice
Practice
Perimeter
The distance round a shape.
PracticeArea of a rectangle
Area as the squares a shape covers.
PracticeArea of a triangle
Half of base times height.
PracticeArea of a parallelogram
Base times perpendicular height.
PracticeArea of a trapezium
Half the sum of the parallel sides times the height between them.
PracticeFinding a length from an area
Running an area formula backwards to recover a base.
PracticePerimeter and area review
Triangles, parallelograms, trapezia and composite shapes.