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139 resources with the keyterm pi

9:57
Lesson Planet

SAT Prep: Test 1 Section 3 Part 4

For Students 9th - 12th
Pushing through to problems 11-12 on page 398 of The Official SAT Study Guide, Sal goes into comprehensive detail on each problem. Problem 11 involves geometry, including the function of pi, and problem 12 involves non-constant slopes....
3:56
Lesson Planet

SAT Prep: Test 6 Section 7 Part 2

For Students 9th - 12th
Helping students realize the common missteps in solving the average SAT problem, Sal creates a lens through which students can clearly see the correct and incorrect approach to each type of problem. He points out what a student might...
8:55
Lesson Planet

SAT Prep: Test 6 Section 7 Part 5

For Students 9th - 12th
On the home stretch of this practice session, Sal completes problems 18 and 19 on page 738 of The Official SAT Study Guide. He begins problem 20, but chooses to finish it in the next video instead of rushing the answer. As always, Sal's...
3:56
Lesson Planet

SAT Prep: Test 3 Section 8 Part 3

For Students 9th - 12th
Geometry and algebra are equally represented in this video, which covers problems 10-14 on the practice SAT. As always, Sal is the expert of quick, efficient ways to solve problems - especially helpful for students who have a difficulty...
4:02
Lesson Planet

Area of a Circle

For Students 7th - 10th
A second installment in a series on circles, this production demonstrates the process of finding the area of a circle. As an introductory tool, it is effective. However, it does not explain the reasoning behind the formula because that...
9:05
Lesson Planet

SAT Prep: Test 8 Section 2 Part 1

For Students 9th - 12th
Test eight from The Official SAT Study Guide includes eighteen problems, the first four of which are featured in this video. Basic algebraic expressions, linear equations, tangent circles, and coordinates on a plane test algebra and...
2:42
Lesson Planet

What's an Irrational Number?

For Teachers 6th - 12th
This video defines rational numbers. Through the definition and examples, learners should comprehend that irrational numbers are numbers that cannot become simple fractions. The video uses examples of very common irrational numbers, such...
1 In 1 Collection 5:04
Lesson Planet

What is the Formula for the Volume of a Cone?

For Teachers 6th - 9th Standards
All you need are a few values to find the the volume of a cone! Watch an informative math video that guides learners through the formula needed, as well as the relationship between the cone's volume and the volume of other...
5:18
Lesson Planet

How Do You Find the Volume of a Sphere?

For Teachers 6th - 12th
The formula for the volume of a sphere is - volume equals four thirds pi times the radius cubed. That's a mouth-full. But if you are given the radius value of the sphere, all you have to do is plug it in and do the arithmetic. Just...
4:23
Lesson Planet

How Do You Find the Area of a Sector of a Circle?

For Teachers 6th - 9th
How do you find the area of a sector of a circle? Use the formula of course. Then all you have to do is plug in the given values and do the math. Make sure you are following the rules of order of operation. The instructor will walk you...
8:37
Lesson Planet

Test 2 Section 2 Part 5

For Students 9th - 12th
Both algebra and geometry problems are featured in this SAT practice video. Students who have a hard time transitioning between skills on tests (average mean, then diameters and pi, then positive integers) would benefit from Sal's deft...
Lesson Planet

A Slice of Pi

For Teachers 7th - 9th
Math pupils, by viewing a video, discover the history of pi and some of the applications of its uses in the world today. They conduct an experiment by measuring the diameter and circumference of various circular objects to calculate...
Lesson Planet

Discovering the Area Formula for Circles—Apple Pi

For Teachers 6th - 8th Standards
Need an activity that brings your class' understanding of the area formula full circle? The second installment in a two-part series involving geometric calculations further develops the young mathematician's measurement, approximation,...
2:06
Lesson Planet

What's an Irrational Number?

For Teachers 6th - 9th
This video defines rational numbers. Through the definition and examples, learners should comprehend that irrational numbers are numbers that cannot become simple fractions. The video uses examples of very common irrational numbers, such...
4:36
Lesson Planet

How Do You Find the Volume of a Cylinder?

For Teachers 6th - 10th
What is the formula to find the volume of a cylinder? Here's the formula - volume equals base times height, and the base of a cylinder is base equals pi times radius squared. If the is a given value for radius, and a given value for...
3:56
Lesson Planet

SAT Prep: Test 4 Section 2 Part 4

For Students 9th - 12th
Taking time to thoroughly explain and work through problems 15-16, Sal models careful reading and problem solving. He begins problem 17 but continues it in the next video.
8:49
Lesson Planet

SAT Prep: Test 2 Section 3 Part 5

For Students 9th - 12th
Sal takes viewers into the home stretch of this practice test session from The Official SAT Study Guide. Problems 17-18 are algebraic equations, while problem 19 focuses on area in a given figure (with the use of pi).
8:43
Lesson Planet

SAT Prep: Test 7 Section 5 Part 2

For Students 9th - 12th
Complicated word problems and expressions are no match for Sal, and after watching this series, they will be no match for your students either! Sal deftly handles problems involving algebraic equations, averages, and circumference.
8:30
Lesson Planet

SAT Prep: Test 5 Section 7 Part 5

For Students 9th - 12th
Geometry problems on the SAT are often the most difficult for students to solve, let alone master. Focusing on several geometry-related skills (as well a few algebra problems), Sal makes this lesson a valuable resource for viewers who...
Lesson Planet

Measuring Circles

For Teachers 5th - 12th
Students discover the area of circles. In this circles lesson, students work to find the circumference and diameter of a circle. Students compare the relation of the area of a circle to a square.
Lesson Planet

Reference Angles

For Teachers 9th - 12th Standards
Learn how to measure the reference angles in degrees and radians.  Students find reference angles that are coterminal with a given angle.
Lesson Planet

Circles, Circles, Everywhere!

For Teachers 9th - 12th
Students explore the concept of circles.  In this circles lesson, students use their Ti-Nspire to collect data on various circles of different sizes.  Students measure the diameter and circumference of the circles and plot the data in a...
Lesson Planet

Factoring Polynomials

For Students 9th
In this factoring polynomials activity, 9th graders solve and complete 33 different multiple choice problems. First, they determine the equation that best represents a simplified form after factoring out the GCF. Then, students determine...
11:05
Lesson Planet

Circles: Radius, Diameter and Circumference

For Students 4th - 11th
Fascinating discussion regarding the origin of Pi accompanies a detailed explanation of how to find the circumference of a circle. Since this is the first installment in a series on circles, the concept of circumference is separated into...