Enlarging a ShapeA shape can be enlarged. It can be made larger or smaller.
How to Enlarge a ShapeEnlarging a shape is easy.
QuestionEnlarge the shape below by a scale factor of 3 about the centre of enlargement (1, 1).
Draw a line from the centre of enlargement to point A.Note: It is useful to extend the line beyond the point.
Measure the length of this line. In our example, the point is 1 diagonal unit from the centre of enlargement (or 1 unit across and 1 up).
Measure the distance found in Step 4 along the line drawn in Step 2. This is the point on the enlarged shape, which we will call A'.
Answer:With all the vertices (corners) of the shape transformed, the enlarged shape can be drawn:
By multiplying the shape by a scale factor of 3, the enlarged shape is 3 times larger and 3 times the distance from the centre of enlargement.