Find a missing side length from the perimeter
Given the perimeter and some known side lengths, find a missing side length of a polygon. Unlimited questions, five difficulty levels, and a full worked solution every time — free.
Try one
A rectangle has a perimeter of 16 cm and a width of 2 cm. What is its length?
Answer: 6 cm
See one solved, step by step
A rectangle has a perimeter of 14 m and a length of 5 m. What is its width?
📘 Worked solution
114 / 2 = 7Half the perimeter equals one length plus one width.
27 - 5 = 2Subtract the length you know to find the width.
Ready to master it?
Jump into unlimited practice — your Winny Score tracks you to 100. And if it won't click, a real tutor will make it click: first lesson free.
Start practicing