# Ch 21: Well-Known Equations

Review some widely-used theories and formulas to prepare for your NY Regents I Algebra exam. These video lessons and quick quizzes will help you review important content in an enjoyable manner.

## Well-Known Equations - Chapter Summary

Reintroduce yourself to widely-used theorems and formulas from the likes of Pythagoras, Newton, Euler, and Fermat. The informative lessons include the following topics for your review:

• The Theory of Relativity
• The Pythagorean Theorem
• Pi as it relates to circumference and diameter
• The formula for the force of gravity according to Newton
• Euler's Identity
• Fermat's last theorem

The lessons in this chapter offer clear definitions and examples to accompany your practice. Listen to each video, or read the transcript, if you'd rather. At the end of each lesson, you can take the quick, multiple-choice quiz to see how you're doing. If there's anything that isn't clear, you can use the helpful video tags to go back and find that portion of the video right away. If you'd rather, you can just watch the entire video a second time.

### Regents Examination in Algebra I (Common Core) Objectives

This test checks to see that high school students are learning sufficient math concepts to prepare for college. It assesses your progress in four areas, including algebra, functions, number and quantity, and statistics and probability. You'll answer 24 multiple-choice questions and 13 constructed-response questions within three hours. The multiple-choice items have four possible answers from which to choose, just like our own online quizzes, which give you targeted practice for test day.

10 Lessons in Chapter 21: Well-Known Equations
Test your knowledge with a 30-question chapter practice test
Chapter Practice Exam
Test your knowledge of this chapter with a 30 question practice chapter exam.
Not Taken
Practice Final Exam
Test your knowledge of the entire course with a 50 question practice final exam.
Not Taken
More Exams
There are even more practice exams available in Well-Known Equations.

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