3.1d Describing the Combination of Two Transformations Given the Object and the Image


3.1d Describing the Combination of Two Transformations Given the Object and the Image

Example 1:
In the diagram above, triangle KLM is the image of triangle ABC under the combined transformations VW. Describe in full, the transformation W and the transformation V.

Solution:
Figure ABC W → Figure KB’C’ V → Figure KLM

W=Translation ( 0 4 )   
V = Enlargement with centre K(1, 1) and a scale factor of 3.


Example 2:
In the diagram above, triangle CKL is the image of triangle ABC under the combined transformations UY. Describe in full, the transformation Y and the transformation U.

Solution:
Figure ABC Y → Figure AB’C U → Figure CKL
Y = Reflection in the straight line y = 6
U = Enlargement with centre C(12, 6) and a scale factor of 2.


Example 3:
In the diagram above, triangle PQR is the image of triangle ABC under the combined transformations TW. Describe in full, the transformation W and the transformation T.

Solution:
Figure ABC W → Figure PBC’ T → Figure PQR
W = Clockwise rotation of 90o about the point B(5, 5)
T = Enlargement with centre P(1, 5) and a scale factor of 2.