Describe what it means to enlarge or reduce a shape.
Explain why we do not use a unit when writing the value of a scale factor.
If we shrink an object to be 20\% of its original size, what reduction factor have we used?
What enlargement factor is the same as multiplying the lengths of a shape by 400\%?
If a scale factor of \dfrac{2}{3} is applied to a shape, will the new shape be larger or smaller than the original?
Consider the following quadrilaterals:
Is quadrilateral A'B'C'D' an enlargement of quadrilateral ABCD?
Find the scale factor.
Consider the following quadrilaterals:
Is quadrilateral A'B'C'D' an enlargement of quadrilateral ABCD? Explain your answer.
The scale factor of these similar triangles is 4:5. Find:
The reduction factor
The enlargement factor
The scale factor of these similar figures is 52:32. Find:
The reduction factor.
The enlargement factor.
The rectangle on the right is an enlargement of the rectangle on the left:
What is the enlargement factor?
Write the scale of the blue rectangle to the green rectangle.
The triangle on the right is a reduction of the triangle on the left.
What is the reduction factor?
Write the scale of the yellow triangle to the purple triangle.
Glass in the shape of a circle has a radius of 12 \text{ cm}. When it is enlarged, the radius becomes 48 \text{ cm}. What is the enlargement factor?