Math 8 · Unit 14: Position and transformation · Cambridge Lower Secondary Maths Stage 8

Questions

1. 1. A 2 cm side is enlarged by scale factor 3. New length?

   • 8 cm
   • 5 cm
   • 2 cm
   • 6 cm
   Check

2. 2. Angles in an enlarged shape …

   • halve
   • stay the same
   • double
   • are multiplied by the scale factor
   Check

3. 3. A side goes from 4 cm to 10 cm. Scale factor?

   • 2.5
   • 2
   • 40
   • 6
   Check

4. 4. Enlarge (2, 3) by scale factor 2, centre the origin.

   • (4, 3)
   • (4, 6)
   • (2, 6)
   • (3, 4)
   Check

5. 5. Enlarge (1, 4) by scale factor 3, centre the origin.

   • (3, 4)
   • (1, 12)
   • (4, 7)
   • (3, 12)
   Check

6. 6. A shape and its enlargement are …

   • unrelated
   • similar
   • reflected
   • congruent
   Check

7. 7. A rectangle 3 cm × 5 cm is enlarged by scale factor 2. New perimeter?

   • 16 cm
   • 30 cm
   • 32 cm
   • 64 cm
   Check

8. 8. A point is 4 units from the centre. After enlargement scale factor 3, how far?

   • 12 units
   • 4 units
   • 7 units
   • 1⅓ units
   Check

9. 9. Scale factor ½ makes a shape …

   • bigger
   • the same size
   • smaller
   • upside down
   Check

10. 10. Enlarge (6, 8) by scale factor ½, centre the origin.

    • (6, 4)
    • (12, 16)
    • (3, 4)
    • (5.5, 7.5)
    Check

11. 11. A triangle has sides 3, 4, 5. Enlarged with scale factor 4, the longest side is …

    • 16
    • 20
    • 9
    • 5
    Check

12. 12. Enlarge (3, 1) by scale factor 2, centre (1, 1).

    • (4, 1)
    • (6, 2)
    • (5, 1)
    • (3, 2)
    Check

13. 13. A square of side 2 cm is enlarged by scale factor 3. Its area is multiplied by …

    • 3
    • 6
    • 27
    • 9
    Check

14. 14. A photo 10 cm wide is enlarged to 25 cm wide. Scale factor?

    • 0.4
    • 2
    • 2.5
    • 15
    Check

15. 15. Which is NOT changed by an enlargement?

    • the area
    • the side lengths
    • the angles
    • the perimeter
    Check