---
title: Then the perimeter is 5 + 8 + 8 = 21 cm. — Perimeter: all the way round a triangle · tree and pragmatics
description: Then the perimeter is 5 + 8 + 8 = 21 cm. Who acts: perimeter. A sentence of the lesson «Perimeter: all the way round a triangle» of the lessons course of Mova's primary school with its dependency tree and the pragmatics of every clause.
---

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# Perimeter: all the way round a triangle, sentence 3

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Then the perimeter is 5 + 8 + 8 = 21 cm.

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**Who acts:** perimeter · **What happens:** be · **To what, where:** 8 21 cm

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This is a sentence of the lesson «Perimeter: all the way round a triangle» of the lessons course of Mova's primary school. The page gives its syntax tree — a dependency tree in the style of Universal Dependencies — and its pragmatics clause by clause: who acts (perimeter), what happens, when and where, as Mova's frames read it from the tree.

## The tree {#tree}

```conllu
# sent_id = school:lessons:136-perimeter-of-a-triangle.lesson:3
# text = Then the perimeter is 5 + 8 + 8 = 21 cm.
# source = school lesson (ours)
# course = lessons
# lesson = 136-perimeter-of-a-triangle.lesson
# annotation = Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×1, R7-rel-agree ×2
1	Then	then	ADV	RB	PronType=Dem	12	advmod	_	_
2	the	the	DET	DT	Definite=Def|PronType=Art	3	det	_	_
3	perimeter	perimeter	NOUN	NN	Number=Sing	12	nsubj	_	_
4	is	be	AUX	VBZ	Mood=Ind|Number=Sing|Person=3|Tense=Pres|VerbForm=Fin	12	cop	_	_
5	5	5	NUM	CD	NumForm=Digit|NumType=Card	9	compound	_	_
6	+	+	SYM	SYM	_	7	advmod	_	_
7	8	8	NUM	CD	NumForm=Digit|NumType=Card	5	conj	_	Agree=R7-rel-agree|Haiku=5:nmod
8	+	+	SYM	SYM	_	9	cc	_	Agree=R7-rel-agree|Haiku=9:advmod
9	8	8	NUM	CD	NumForm=Digit|NumType=Card	12	nummod	_	_
10	=	=	SYM	SYM	_	11	case	_	_
11	21	21	NUM	CD	NumForm=Digit|NumType=Card	12	nummod	_	Agree=R5-strong|Haiku=9:nmod
12	cm	cm	NOUN	NNS	Number=Plur	0	root	_	_
13	.	.	PUNCT	.	_	12	punct	_	_
```

## Pragmatics {#pragmatics}

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- form: statement
- act: assert
- voice: narrator
- polarity: none
- teacher: kept the draft

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| # | verb | tense, mood | who | what, whom | to whom | where | when | other | roles by |
| --- | --- | --- | --- | --- | --- | --- | --- | --- | --- |
| 1 | **is a** | present | the perimeter | 8 21 cm |  |  | then |  | tree rules |

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One row per clause the reader finds. «not said here»: a role filled from the clause above. «roles by»: a VerbNet class and frame when one fits the verb, else the reader's rules on the tree.

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**Licence: [CC BY-SA 4.0](https://creativecommons.org/licenses/by-sa/4.0/)**, as the whole of Mova corpus 0.4, of which this treebank (the agreed school, `mova-school-agreed-en.conllu`) is part. The lessons were written for Mova's primary school. Sentence `school:lessons:136-perimeter-of-a-triangle.lesson:3`.

**The tree:** Mova annot: Rust (en) → Haiku 5.5 (medium, Batches API) patches; gates UD 2.18; agreed by treeagree rules (Stanza, Trankit, spaCy trf): R5-strong ×1, R7-rel-agree ×2. **The frames** are read from the tree by Mova's frames reader (`prag`) when this page is built, the lesson read in order, so a pronoun may be resolved from an earlier sentence.

See the [release 0.4](https://md.mova.elamur.ai/free/en/releases/0.4/).

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- ← previous: [Perimeter: all the way round a triangle, 2](https://md.mova.elamur.ai/free/en/corpora/school/lessons/136-perimeter-of-a-triangle/2/)
- next →: [Brackets in a story: first the group,…, 0](https://md.mova.elamur.ai/free/en/corpora/school/lessons/137-brackets-as-stories/0/)
- ↑ back to [the lesson](https://md.mova.elamur.ai/free/en/corpora/school/lessons/136-perimeter-of-a-triangle/)