### Describing perimeters

In this lesson, you will use different units of length to describe perimeter; calculate the perimeter of polygons and estimate the perimeter of ‘curved’ shapes.

8 lessons

In this lesson, you will use different units of length to describe perimeter; calculate the perimeter of polygons and estimate the perimeter of ‘curved’ shapes.

In this lesson, you will use different square units to describe area and use informal counting strategies to calculate area.

In this lesson, you will analyse the effect of cutting, moving and combining shapes on area and perimeter.

In this lesson, you will explore the perimeter and area of rectangles as the dimensions change.

In this lesson, you will learn to calculate the area (and perimeter) of rectilinear shapes by ‘combining’ rectangles.

In this lesson, you will learn to calculate the area of parallelograms by rearranging rectangles and you will arrive at a formula for the area of a parallelogram.

In this lesson, you will learn to calculate the area of triangles and link the area of triangles to the area of parallelograms.

In this lesson, you will solve further problems involving area of triangles.

Units in Maths

Units in Geometry

- Numbers and numerals
- Axioms and arrays
- Factors and multiples
- Order of operations
- Positive and negative numbers
- Expressions, equations and inequalities
- Angles
- Classifying 2-D shapes
- Constructing triangles and quadrilaterals
- Coordinates
- Area of 2-D shapes
- Transforming 2-D figures
- Prime factor decomposition
- Conceptualising and comparing fractions
- Manipulating and calculating with fractions
- Ratio
- Percentages
- Different number systems
- Sequences
- Forming and solving equations
- Forming and solving inequalities
- Linear graphs
- Accuracy and estimation
- Algebra and problem solving
- Ratio (8.7a)
- Ratio, real life graphs, and rates of change
- Direct and indirect proportion
- Univariate data
- Bivariate data
- Famous maths problems
- Angles and parallel lines review
- Angles in polygons
- Bearings
- Volume and surface area of prisms
- Area review
- Circles
- FDP review (9.1a)
- Probability
- Sets, Venn and sample space diagrams
- Solving linear simultaneous equations algebraically
- Solving linear simultaneous equations graphically
- Angle review (9.5a)
- Constructions, congruence, and loci
- Pythagoras’s theorem
- Famous maths problems
- Ratio review (9.7a)
- Similarity and enlargement
- Surds and trigonometry
- Quadratic expressions (9.9)
- Quadratic equations (9.10)
- Indices and standard form
- Growth and decay
- Finance

- Faces, shapes and patterns: lines and turns
- Circles
- Transformations
- Angles
- Shape and pattern
- Bearings
- Coordinates
- Angles and shape
- Shape and sorting
- Constructions, congruence, and loci
- Transforming 2-D figures
- 2-D and 3-D shape
- Angles in polygons
- 3D Shape
- Coordinates and shape
- Classifying 2-D shapes
- Area of 2-D shapes
- Pythagoras’s theorem
- 2-D Shape and Symmetry
- Missing angles and lengths
- Volume and surface area of prisms
- Ratio review (9.7a)
- Constructing triangles and quadrilaterals
- Shape and patterns