Ask the Chatbot Games & Quizzes History & Society Science & Tech Biographies Animals & Nature Geography & Travel Arts & Culture ProCon Money Videos
parallelogram
Introduction References & Edit History Related Topics
Images
A grid displays a green rectangle, a red parallelogram, and a purple triangle, each labeled with base and height dimensions. Area formulas are shown: rectangle and parallelogram as base times height, triangle as one-half base times height. Figure 11: Construction for the dissection of parallelograms (see text). Figure 13: Constructions for the equivalence by dissection of (left) squares and (right) parallelograms (see text). Figure 12: Construction for the proof of equivalency of parallelograms by dissection (see text). vector parallelogram for addition and subtraction

parallelogram: References & Edit History

Article Contributors

Primary Contributors

  • Melissa Petruzzello
    Melissa Petruzzello (she/her) is Assistant Managing Editor and covers plants, algae, fungi, insects, spiders, renewable energy and environmental engineering. She also handles certain topics in Christianity, notably Protestant history and churches. 

Other Encyclopedia Britannica Contributors

Article History

Type Description Contributor Date
Modified link of Web site: Mathematics LibreTexts - Parallelograms. Sep 04, 2026
Add new Web site: IOPscience - Journal of Physics A: Mathematical and Theoretical - Skew parallelogram nets and universal factorization. Sep 27, 2025
Add new Web site: IOPscience - Journal of Physics A: Mathematical and Theoretical - Skew parallelogram nets and universal factorization. Sep 27, 2025
Add new Web site: Khan Academy - Proof: Opposite sides of a parallelogram. May 09, 2025
Cross-reference added. Apr 03, 2024
Article restructured. Jun 20, 2023
Add new Web site: Story of Mathematics - Parallelogram|Definition and Meaning. May 26, 2023
Add new Web site: Mathematics LibreTexts - Parallelograms. Jan 20, 2023
New article added. Jun 03, 2022
View Changes:
Article History
Revised:
By: