1. LEARN HOW TO CARRY OUT ENLARGEMENTS AND REDUCTIONS
2. Keep on practising with enlargements and reductions
http://www.waldomaths.com/Enlarge1L.jsp
3. Work out the ratio of the areas of two similar figures
http://www.absorblearning.com/media/item.action?quick=i9
4. TO LEARN MORE
http://regentsprep.org/Regents/math/geometry/GT3/indexGT3.htm
5. Practice with Similarity Numerical Problems
http://www.regentsprep.org/Regents/math/geometry/GP11/PracSim.htm
6. SCALE ON THE BIG SCREEN
http://go.hrw.com/math/cnn/course3/3_7_Scale/3_7_Scale.htm
7. THE GATEWAY ARCH
http://go.hrw.com/math/cnn/course3/3_7_Arch/3_7_Arch.htm