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

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

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So if Chinese written language is picture characters, how do they write complicated words like 'methyl hydroxy acetate'? - Quora

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What is a Rectangle?, Rectangle Shape

What is a Rectangle?, Rectangle Shape

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American Heritage Dictionary: Third Edition: 9780440218616: Houghton Mifflin Company: Books

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