CHAPTER 16. GEOMETRY 16.6
(c) OC is rotated to OC�with C(−1;−4) and C�(1;4)- Copy ΔXY Z onto squared paper. The co-ordinates are givenon the picture.
(a) Rotate ΔXY Z anti-clockwise throughan angle of 90 ◦about the origin to give ΔX�Y�Z�.
Give the co-ordinates of X�, Y�and Z�.
(b) Rotate ΔXY Z through 180 ◦about the origin to give ΔX��Y��Z��. Give the co-ordinates of
X��, Y��and Z��.X(4;4)
Y (−1;−4)
Z(−4;−1)
More practice video solutions or help at http://www.everythingmaths.co.za(1.) 0138 (2.) 0139
Enlargement of a Polygon EMBCQ
When something is made larger, we say that it is enlarged. What happens to thecoordinates of a
polygon that is enlargedby a factor k?
Activity: Enlargement of a Polygon
Complete the table, by filling in the coordinatesof the points shown in the figure. Assume
each small square on the plot is 1 unit.