LEARNING OBJECTIVE: You will discover how to use your expertise in ratio to solve similar triangle problems
SUCCESS CRITERIA: You will be able to identify two similar triangles and use ratio knowledge to solve problems
STARTER: Look at these shapes and answer the following questions
- What is the scale factor of enlargement from shape A to shape B
- What is the scale factor of enlargement from shape B to Shape A
- What is the scale factor of enlargement from shape C to shape D
- What is the scale factor of enlargement from shape D to Shape C
- Now draw your own shape using the squares in your book as a guide and label it E
- Draw the image of E after it has been enlarged by a scale factor of 2.5 and label it F
- What is the scale factor of enlargement from F to E
LESSON: Work through the MyMaths lesson on similarity. Use the question screens repeatedly if necessary.
PLENARY: Checking answers to onscreen questions on teacher screen
Work through Ex 16A on Page 365 –From q2 onwards
PLENARY: How do we know when two triangles are similar?
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