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Year 9

Geometrical properties: similarity and Pythagoras' theorem

Lessons (17)

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Checking understanding of similarity

I can enlarge a shape and can state what changes and what is invariant.

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Checking understanding of congruence

I can translate, reflect and rotate a shape.

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Similarity in shapes

I can recognise that similar shapes have sides in proportion to each other but angle sizes are preserved.

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Congruence in shapes

I can recognise that for congruent shapes both side lengths and angle sizes are preserved.

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Congruent, similar or neither

I can differentiate between shapes which are congruent or similar or neither.

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Rotational symmetry

I can recognise rotational symmetry in shapes.

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Congruent triangles (SSS)

I can appreciate and use the criteria by which triangles are congruent (SSS).

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Congruent triangles (SAS)

I can appreciate and use the criteria by which triangles are congruent (SAS).

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Congruent triangles (ASA and AAS)

I can appreciate and use the criteria by which triangles are congruent (ASA and AAS).

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Congruent triangles (RHS)

I can appreciate and use the criteria by which triangles are congruent (RHS).

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Applying the criteria for congruence

I can identify congruent triangles and prove why they are congruent.

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Demonstrating Pythagoras' theorem

I can appreciate there is a relationship between the lengths of the sides of a right-angled triangle.

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Length of the hypotenuse

I can use Pythagoras' theorem to find the length of the hypotenuse.

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Length of a shorter side

I can use Pythagoras' theorem to find the length of one of the shorter sides.

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Determining which side

I can identify which side length is missing and use the appropriate form of Pythagoras' theorem to calculate it.

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Pythagoras' theorem in context

I can use and apply Pythagoras' theorem to solve problems in a range of contexts.

1 Slide deck

1 Worksheet

2 Quizzes

1 Video

Problem solving with similarity and Pythagoras' theorem

I can use my knowledge of similarity and Pythagoras' theorem to solve problems.

1 Slide deck

1 Worksheet

2 Quizzes

1 Video