Sophia Learning
Sophia: Estimating Square Roots: Lesson 4
Here, the student will be shown how to estimate the value of a root when they are not taking the root of a perfect square. This lesson is 4 of 9 in the series titled "Estimating Square Roots."
Sophia Learning
Sophia: Estimating Square Roots: Lesson 5
Here, the student will be shown how to estimate the value of a root when they are not taking the root of a perfect square. This lesson is 5 of 9 in the series titled "Estimating Square Roots."
Sophia Learning
Sophia: Estimating Square Roots: Lesson 1
Here, the student will be shown how to estimate the value of a root when they are not taking the root of a perfect square. This lesson is 1 of 9 in the series titled "Estimating Square Roots."
Sophia Learning
Sophia: Rational and Irrational Numbers
In this lesson, students will learn Rational and Irrational Numbers.
Khan Academy
Khan Academy: Vi Hart: Rhapsody on the Proof of Pi = 4
Video explores properties of circles and what is wrong with the proof that pi is equal to four. [5:55]
McGraw Hill
Glencoe Online Learning Center: Personal Tutor: Estimate Square Roots
This step-by-step example explores how to use rational approximations of irrational numbers to compare the size of irrational numbers.