Khan Academy
SAT Prep: Test 7 Section 5 Part 5
Sal completes problem 20 from this session of the practice SAT (page 796). He draws the parallelogram necessary for solving the problem, and spends a good amount of time explaining the process and method behind the answer. This video is...
Khan Academy
SAT Prep: Test 6 Section 9 Part 4
Putting the finishing touches on this practice session, Sal takes students through an algebra problem involving percentages (or decimals, as he prefers) and a geometry problem with equilateral rectangles. Students who need a little more...
Khan Academy
SAT Prep: Test 3 Section 8 Part 4
Fans of algebra, geometry, and hamsters will enjoy this video, which finishes this practice test with problems 15-16. Sal carefully, methodically, and efficiently takes students through the necessary steps for solving increasingly...
Khan Academy
SAT Prep: Test 7 Section 8 Part 2
Continuing his SAT review session, Sal explores problems with slopes, linear equations, and congruent angles. He begins problem 10 (geometry) but finishes the problem in the next video.
Khan Academy
SAT Prep: Test 4 Section 8 Part 3
Help your students get the edge on the SAT with this practice video, which details ways to solve various algebra and geometry problems. Sal finishes problem 18 in this video, changing his pace for understanding, and continues to solve...
Khan Academy
SAT Prep: Test 8 Section 2 Part 1
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...
Khan Academy
SAT Prep: Test 2 Section 3 Part 3
Covering geometry, linear equations, and mathematical patterns, Sal discusses problems 9-12 on the practice SAT. His easygoing manner and clever calculations will keep students' interest far longer than reviewing SAT questions from a...
Khan Academy
SAT Prep: Test 2 Section 6 Part 3
Sal's dedication is clear in this video, which takes place on Thanksgiving Day. The problems focus on algebra (averages and linear equations) and geometry (perimeters and angles). Viewers beware: Sal makes a self-professed error on...
Khan Academy
Part 1 of Proof of Heron's Formula, Perimeter, Area, and Volume, Geometry
This video is the first installment in a series devoted to exploring Heron's Formula. It is a high-level experience that delves into proof using algebra. It demonstrates a step-by-step process for finding the area of a triangle using...
Khan Academy
Part 2 of Proof of Heron's Formula, Perimeter, Area, and Volume, Geometry
Picking up where the prior installment in the series on HeronÕs formula ended, Sal provides a more detailed explanation.
Khan Academy
Similar Triangles, Similarity, Geometry
Although a rather complicated topic, this video clearly explains the concept of solving problems involving similar triangles. It employs problem-solving to determine whether two figures are similar triangles. In addition, it provides...
Khan Academy
The Angle Game, Angles and Intersecting Lines, Geometry
A motivating activity is coupled with the use of algebra to explore the process of identifying the value of an angle. It feels like magic when Sal shows the solution to the final problem. Also, it would be worthwhile to consider using...
Khan Academy
Acute Right and Obtuse Angles, Angles and Intersecting Lines, Geometry
This resource highlights the basics of working with angles and could provide a sound introductory activity for students who are beginning to learn about angles. Eager mathematicians will be introduced to the terminology associated with...
Curated OER
Angles Formed Between Transversals and Parallel Lines, Geometry
While exploring the concept of transversals, Sal discusses corresponding angles, congruent angles, and opposite/vertical angles. He provides a thorough summation of these mathematical concepts. It is the first installment in a series...
Khan Academy
Angles of Parallel Lines 2, Angles and Intersecting Lines, Geometry
This resource explores parallel lines and requires students to practice calculations and analyze angles. By asking viewers to decide whether two lines are parallel based on the information given, this second part of the parallel lines...
Khan Academy
Area of Diagonal Generated Triangles of Rectangle Are Equal, Geometry
This lecture explores finding the area of each of the triangles created by drawing two diagonal lines through a rectangle. It provides a detailed explanation of how to use a formula to solve the given problem. Tip: Use this for test...
Khan Academy
The Angle Game, Angles and Intersecting Lines, Geometry
A motivating activity is coupled with the use of algebra to explore the process of identifying the value of an angle. It feels like magic when Sal shows the solution to the final problem. Also, it would be worthwhile to consider using...
Khan Academy
Similar Triangles (Part 2), Similarity, Geometry
Building on concepts in the first part of the series on similar triangles, installment number two explores how to find the values for given angles in a triangle. These problems are solved by using algebra and ratios. A step-by-step...
Khan Academy
Intro to 30-60-90 Triangles, Right Triangles and Trigonometry, Geometry
As the fourth part of a series on the Pythagorean Theorem, Sal continues an exploration of the ways to calculate the length of sides of a right triangle using algebra. He also used this theorem to solve problems involving a right...
Khan Academy
Area of Diagonal Generated Triangles of Rectangle are Equal, Geometry
This lecture explores the area of each triangle created by drawing two diagonal lines through a rectangle. It provides a detailed explanation of how to use a formula to solve the given problem. Tip: Use this for test preparation purposes.
Khan Academy
Angles Formed Between Transversals and Parallel Lines, Geometry
While exploring the concept of transversals, Sal discusses corresponding angles, congruent angles, and opposite/vertical angles. He provides a thorough summation of these mathematical concepts. It is the first installment in a series...
Khan Academy
Angles of Parallel Lines 2, Angles and Intersecting Lines, Geometry
Providing an exploration of parallel lines, this resource requires students to not only practice calculations, but also to analyze angles. By asking viewers to decide whether two lines are parallel based upon the information given, this...
Brightstorm
Area of Parallelograms
Make math easier by showing the class that even formulas can be parallel — just explore the area of a parallelogram. Learners discover how to create a rectangle from a parallelogram, then make the connection that the...
Brightstorm
Locus and Definition of a Circle and Sphere
Vocabulary is key to understanding geometry, so start your learners out on the right foot! Scholars learn how to read and interpret geometric statements with an informative video, which uses the idea of locus to create the...
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