Square Roots
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Lesson Summary:
In this lesson about square roots, Professor Perez teaches us about perfect squares and how to compute the square root of non-perfect squares using a calculator. He also introduces the Pythagorean theorem and how to use it to solve right triangle problems. Finally, he teaches us how to simplify expressions with square roots and how to add and subtract them. By the end of the lesson, we are able to confidently calculate square roots and apply this knowledge in real-world scenarios.
Lesson Description:
Learn how to compute square roots.
Created by and copyright of Larry Perez. Funded by the state of California through Saddleback College. More information on videos, resources, and lessons at Algebra2Go.
Questions answered by this video:
- What is a square root or radical and how do you find their values?
- What is the square root of 16?
- What is a principle square root?
- What are perfect squares?
- How do you find the square root of a perfect square like 49, 144, 64, or 100?
- How do you find the square root of 10 on a calculator?
- How do you find the unknown side length of a right triangle if the height is 5in and the hypotenuse is 13in?
- What is the Pythagorean Theorem and how do you use it to find side lengths in triangles?
- What is sqrt(4) + sqrt(9)?
- What is sqrt(16) - sqrt(25)?
- What is 3*sqrt(64) - 2*sqrt(49)?
- How do you find the square root of a fraction, like sqrt(25/9) + sqrt(81/16)?
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Staff Review
This lesson is all about square roots and computing their values. Also, some square roots are added and subtracted, as well as multiplied by integers. Perfect squares and finding their values are also discussed, and the Pythagorean Theorem is used to solve some problems. This is a great place to start for introducing square roots. -
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