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title: A missing side from the perimeter or the area — a lesson of Mova's school · trees and pragmatics
description: «A missing side from the perimeter or the area», a lesson of the lessons course of Mova's primary school, sentence by sentence with dependency trees and pragmatics. It begins: A square has four equal sides, so one side is the perimeter divided by 4: a perimeter of 28 cm gives 28 ÷ 4 = 7 cm.
---

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# A missing side from the perimeter or the area

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Lesson 107 of the lessons course of Mova's primary school: 2 sentences, each with its syntax tree and pragmatics. The lessons are written for Mova, and their agreed trees are part of Mova corpus 0.4 (CC BY-SA 4.0).

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- [0](https://md.mova.elamur.ai/free/en/corpora/school/lessons/107-side-from-perimeter-or-area/0/) — A square has four equal sides, so one side is the perimeter divided by 4: a perimeter of 28 cm gives 28 ÷ 4 = 7 cm.
- [1](https://md.mova.elamur.ai/free/en/corpora/school/lessons/107-side-from-perimeter-or-area/1/) — The area of a rectangle is length × width, so the width is the area divided by the length: 24 square meters and a length of 6 m give 24 ÷ 6 = 4 m.

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- ← previous: [The area of a rectangle in square units](https://md.mova.elamur.ai/free/en/corpora/school/lessons/106-area-of-a-rectangle/)
- next →: [Sides and corners of many shapes](https://md.mova.elamur.ai/free/en/corpora/school/lessons/108-sides-and-corners-of-shapes/)
- ↑ back to [Lessons](https://md.mova.elamur.ai/free/en/corpora/school/lessons/)