Rotational Symmetry
In this lesson you will learn what rotational symmetry is and also the way to work out the order of rotational symmetry for a given shape.
Unit: Classifying 2-D shapes
Lessons:
8 lessons
Lines of symmetry
In this lesson you will learn about lines of symmetry and the way to determine how many lines of symmetry a shape has.
Classifying triangles
In this lesson you learn how to describe the properties of scalene, isosceles and equilateral triangles. You will also learn how to identify and classify triangles inscribed in circles.
Angles in a triangle
In this lesson, you will understand that the interior angles in a triangle sum to 180°. Solve problems involving unknown angles in triangles.
Comparing quadrilaterals
In this lesson, you will recap your knowledge on quadrilaterals and compare quadrilaterals by comparing symmetry, side length, parallel sides and angles.
Diagonals in quadrilaterals
In this lesson, you will compare the properties of diagonals in quadrilaterals.
Internal angles in a quadrilateral
In this lesson, you will be able to use triangles to deduce the sum of the interior angles in a quadrilateral. You will also be able to find unknown angles in quadrilaterals.
Tessellating quadrilaterals
In this lesson, you will use the properties of triangles and quadrilaterals to create and describe tessellation patterns.
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