Year 9
Geometry and transformations
Choose a subtopic, explore its examples and practise with feedback.
Choose a subtopic.
Explore geometry and transformations for Year 9. Each subtopic has sample questions and worked answers; choose the skill you want to practise.
010203
Length, area and volume scale factors
Length, area and volume scale factors
Examples, answers and practiceCombine parallel-line, triangle and parallelogram properties
Combine parallel-line, triangle and parallelogram properties
Examples, answers and practiceCoordinate enlargements and invariants
Coordinate enlargements and invariants
Examples, answers and practiceMake, test and investigate.
Design and refine an algorithm
Build a procedure to identify possible triangles and Pythagorean triples. Test boundary cases and refine your decisions.
Guided activity · No gradeExplore enlargement invariants
Draw a triangle, choose a centre and scale factor, then construct its enlarged image. Compare side ratios, areas and angles.
Guided activity · No grade