AA

BB

CC A’A’

B’B’

C’C’

Similar Shapes

The following diagram shows an enlargement by a scale factor 3 of triangle ABC

Note

•Each length on the enlargement A’B’C’ is three times the corresponding length on the original shape.

•The distance of any point on the enlargement from the centre of enlargement is three times longer than the corresponding distance on the original shape

Enlarge the Following Shapes

1) Scale factor 2

2) Scale factor 3

3) Scale factor 1/2

44

11

Draw this face in your Draw this face in your book to your choice book to your choice

(suggest 1cm high by 2 (suggest 1cm high by 2 cm wide)cm wide)

44

44

Solutions

1) Scale factor 2

2) Scale factor 3

88

22

3) Scale factor 1/2

Thus 4 triangles fit into the original Thus 4 triangles fit into the original triangle.triangle.