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- GCE O-Level A Maths
- Scale Factors and Similarity
Enlargements and reductions with scale factors
- Intro Lesson4:24
- Lesson: 1a2:06
- Lesson: 1b1:42
- Lesson: 22:12
- Lesson: 3a2:06
- Lesson: 3b0:52
- Lesson: 3c0:44
Enlargements and reductions with scale factors
When you are asked to make an object bigger or smaller, you will ask, "by how much?" In this case, scale factor can help answer the question. In this lesson, we will practice how to enlarge and reduce objects according to the scale factors given to us.
Related Concepts: Congruence and congruent triangles, Triangles congruent by SSS proofs, Triangles congruent by SAS and HL proofs, Triangles congruent by ASA and AAS proofs
Lessons
- Introductiona)What is a scale factor?
- 1.Redraw the letters below using a scale factor of 2.a)
b)
- 2.Redraw the shape using a scale factor of 41 .
- 3.The ratio of the length to the width of a window is 3:2. If the window is 8 m wide, what are the dimensions of the window that has a scale factor of:
a)0.5?b)2?c)3?
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32.
Scale Factors and Similarity
32.1
Enlargements and reductions with scale factors
32.2
Scale diagrams
32.3
Similar triangles
32.4
Similar polygons