Geometry
Missing side
Name: Date:
Find the missing side. All lengths are in centimetres.
1 cm
2 cm
3 cm
4 cm
5 cm
6 cm
7 cm
8 cm
Free · Grade 4 · Sides to 35 cm
Missing side length worksheets
Working on missing side length? Print this sheet as it is, or change the level and questions first.
- Answer key included
- Reopen this exact sheet
- Letter & A4 ready
Ready to printMissing side length
The answer key prints on a separate page.
What's on this sheet
The figure says which measurement it is giving you. A rectangle marked A = 48 and a rectangle marked P = 48 are different questions with different answers, so the letter is printed with the number rather than left to be guessed. That small piece of notation is also a child's first meeting with a formula being read in reverse.
Why this sheet works
Working backwards from the area means dividing; working backwards from the perimeter means halving and then subtracting. Mixing the two on one sheet is the hardest and most useful setting, because the child has to read the figure before choosing a method rather than applying the same move eight times.