vocabulary - I need a word to describe the quality of a rectangle

I would like a more formal word that describes the rectangle on the left as opposed to the slanted one on the right. For some reason, I can't seem to think of a description without being wordy

4 — Bag of Words Model in NLP. In this article, we will cover the Bag…, by Aysel Aydin

These vocabulary base words task cards for 3rd grade students are created to focus on identifying context clues, word relationships, and more.

Vocabulary Base Words Task Cards - 3rd Grade - FL BEST

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8th Grade Math Vocabulary Activities

vocabulary - I need a word to describe the quality of a rectangle that is upright - English Language & Usage Stack Exchange

Rectangle synonyms - 154 Words and Phrases for Rectangle

SOLVED: Describe the quadrilateral???. It is a rectangle? and what else? Name Can I classify Quadrilaterals Please pick some words that describe the quadrilateral Or 1: square square rectangle rectangle rhombus rhombus

Chapter 3. Putting Ideas into Your Own Words and Paragraphs – Writing for Success – 1st Canadian Edition

Properties of a Rectangle - Characteristics of a rectangle, FAQs

What is a Rectangle?, Rectangle Shape

150 Great Complimentary Words and Phrases to Use in Customer Service

RECTANGLE Synonyms: 14 Similar and Opposite Words