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Missing side of similar rectangles

Grade 7 math · Fieldbook Learning

Name ______________________ Date __________

Find the scale factor between the matching sides, then use it on the other side.

  1. Two rectangles are similar. The small one is 7 cm by 2 cm. The large one has a side matching the first side that is of 14 cm. How long is the other side of the large rectangle, in cm?
  2. Two rectangles are similar. The small one is 5 cm by 11 cm. The large one has a side matching the first side that is of 25 cm. How long is the other side of the large rectangle, in cm?
  3. Two rectangles are similar. The small one is 11 cm by 4 cm. The large one has a side matching the first side that is of 44 cm. How long is the other side of the large rectangle, in cm?
  4. Two rectangles are similar. The small one is 3 cm by 4 cm. The large one has a side matching the first side that is of 6 cm. How long is the other side of the large rectangle, in cm?
  5. Two rectangles are similar. The small one is 2 cm by 9 cm. The large one has a side matching the first side that is of 4 cm. How long is the other side of the large rectangle, in cm?
  6. Two rectangles are similar. The small one is 2 cm by 8 cm. The large one has a side matching the first side that is of 8 cm. How long is the other side of the large rectangle, in cm?
  7. Two rectangles are similar. The small one is 14 cm by 6 cm. The large one has a side matching the first side that is of 28 cm. How long is the other side of the large rectangle, in cm?
  8. Two rectangles are similar. The small one is 9 cm by 13 cm. The large one has a side matching the first side that is of 18 cm. How long is the other side of the large rectangle, in cm?
  9. Two rectangles are similar. The small one is 3 cm by 6 cm. The large one has a side matching the first side that is of 24 cm. How long is the other side of the large rectangle, in cm?
  10. Two rectangles are similar. The small one is 10 cm by 7 cm. The large one has a side matching the first side that is of 40 cm. How long is the other side of the large rectangle, in cm?
  11. Two rectangles are similar. The small one is 6 cm by 4 cm. The large one has a side matching the first side that is of 48 cm. How long is the other side of the large rectangle, in cm?
  12. Two rectangles are similar. The small one is 7 cm by 10 cm. The large one has a side matching the first side that is of 21 cm. How long is the other side of the large rectangle, in cm?
  13. Two rectangles are similar. The small one is 6 cm by 4 cm. The large one has a side matching the first side that is of 24 cm. How long is the other side of the large rectangle, in cm?
  14. Two rectangles are similar. The small one is 21 cm by 7 cm. The large one has a side matching the first side that is of 189 cm. How long is the other side of the large rectangle, in cm?
  15. Two rectangles are similar. The small one is 12 cm by 11 cm. The large one has a side matching the first side that is of 48 cm. How long is the other side of the large rectangle, in cm?
  16. Two rectangles are similar. The small one is 14 cm by 14 cm. The large one has a side matching the first side that is of 28 cm. How long is the other side of the large rectangle, in cm?
  17. Two rectangles are similar. The small one is 22 cm by 24 cm. The large one has a side matching the first side that is of 110 cm. How long is the other side of the large rectangle, in cm?
  18. Two rectangles are similar. The small one is 3 cm by 25 cm. The large one has a side matching the first side that is of 36 cm. How long is the other side of the large rectangle, in cm?
  19. Two rectangles are similar. The small one is 11 cm by 14 cm. The large one has a side matching the first side that is of 132 cm. How long is the other side of the large rectangle, in cm?
  20. Two rectangles are similar. The small one is 20 cm by 4 cm. The large one has a side matching the first side that is of 80 cm. How long is the other side of the large rectangle, in cm?
More free practice: fieldbooklearning.com/ca/practice/grade-7/missing-side-of-similar-rectangles/

Answer key: Missing side of similar rectangles

  1. 4
  2. 55
  3. 16
  4. 8
  5. 18
  6. 32
  7. 12
  8. 26
  9. 48
  10. 28
  11. 32
  12. 30
  13. 16
  14. 63
  15. 44
  16. 28
  17. 120
  18. 300
  19. 168
  20. 16