Enlargements and reductions with scale factors

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.
Basic Concepts: Ratios, Rates, Proportions
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

  • Introduction
    a)
    What is a scale factor?

  • 1.
    Redraw the letters below using a scale factor of 2.
    a)

    Enlargements and redraw the graph with scale factors

    b)

    Enlargements the graph with scale factor given

  • 2.
    Redraw the shape using a scale factor of 14\frac{1}{4} .
    Enlarging and reducing shapes with scale factors
  • 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:
    Enlargements and reductions with scale factors
    a)
    0.5?

    b)
    2?

    c)
    3?

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17.
Scale Factors and Similarity
17.1
Enlargements and reductions with scale factors
17.2
Scale diagrams
17.3
Similar triangles
17.4
Similar polygons
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