Finding a Missing Side Length
If you know the perimeter of a figure, you can find the missing length of a side by subtracting the other side lengths from the perimeter.
Finding a Missing Side Length![](/ccss/3rd_grade/worksheets/finding_a_missing_side_length_3_md_8_part_2.jpg)
Related Links:
Finding 10 More or Less
Finding the Unknown Number
Finding the Perimeter of a Polygon