# Square Roots and Radicals 3

Taught by YourMathGal
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Lesson Summary:

In this lesson on Square Roots and Radicals, you will learn how to estimate the square roots of non-perfect square numbers. By identifying the perfect squares just below and just above the non-perfect square, you can estimate the square root to be between two whole numbers. This method can be done mentally or with a calculator, but it's important to remember that the answer is an approximation and not an exact value.

Lesson Description:

Learn about square roots of numbers that are not perfect squares. This video will teach you how to approximate irrational square roots between two whole numbers in your head as well as approximating their value on a calculator.

More free YouTube videos by Julie Harland are organized at http://yourmathgal.com

• How do you approximate / find / take the square root of a number that is not a perfect square?
• What is the square root of 19?
• How can you approximate the square root of 19?
• What is an irrational number?
• When is a square root irrational?
• How can you figure out what two integers or whole numbers the square root of a number is between?
• How can you find consecutive whole numbers that a square root is in between to approximate a square root?
• How can you use a calculator to approximate square roots to the nearest thousandth?
• #### Staff Review

• Currently 4.0/5 Stars.
This lesson explains the concept of irrational numbers. The idea of taking the square root of numbers that are not perfect squares is explained, and the concept of estimating the square root of a number is shown by determining what two whole numbers the square root is in between.