Khan Academy
SAT Prep: Test 2 Section 6 Part 5
Addressing problems 15-16 on the practice SAT, Sal draws the diagram necessary for solving the geometry problem in number 15. After solving for the area of the triangle, he goes on to the quadratic equation in number 16, taking care to...
Khan Academy
SAT Prep: Test 3 Section 4 Part 3
Continuing his lessons on the practice SAT, Sal takes students through problems 10-13, which involve absolute value, comparing angles in a geometric diagram, and finding the median number in a set of consecutive integers. Students will...
Khan Academy
SAT Prep: Test 3 Section 2 Part 4
Finding perimeters and slopes is the focus of this video, which details ways to solve problems 15-17 on the practice SAT. Even students who are confident in their ability to pass the SAT would benefit from this additional review.
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...
Scholastic
Study Jams! Types of Lines
Get jamming with lines and sing along to this karaoke that reviews the main types of lines. Your learners can't forget the main properties of lines when they sing the chorus on the karaoke song after the included slide show. The slides...
Curated OER
What are Perpendicular Lines?
By definition, perpendicular lines intersect and form a 90 degree right angle. Want to know how to determine if lines are perpendicular based on two linear equations? Check out their slope values. Are they negative reciprocals? Does...
Curated OER
How Do You Find the Slope of a Line If You Have a Perpendicular Line?
What kind of lines have slopes that are the opposite reciprocal of each other? Parallel lines? No. Parabolas? No. Perpendicular lines? Yes! Watch and listen as the instructor demonstrates how to make these determinations about...
Curated OER
What are Perpendicular Lines?
Perpendicular lines intersect to form right angles - four of them to be exact. Vertical angles, congruent angles, 90 degrees each, these are some of the special properties of perpendicular lines. Watch this video to find out a couple...
Curated OER
How Do You Use Complementary Angles to Find a Missing Angle?
Are complementary angles nice to each other? That's not what complementary means in math. Complementary angles are two angles that add up to 90 degrees and form a right triangle. So if given one value in a problem about complementary...