Vectors and spaces (Khan Academy)

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Let’s get our feet wet by thinking in terms of vectors and spaces. (1) Vectors Vector intro for linear algebra Real coordinate spaces Adding vectors algebraically & graphically Multiplying a vector by a scalar Vector examples Scalar multiplication Unit vector notation Unit vectors Add & subtract vectors Add vectors: magnitude & direction to component Parametric […]

Special properties and parts of triangles (Khan Academy)

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You probably like triangles. You think they are useful. They show up a lot. What you’ll see in this topic is that they are far more magical and mystical than you ever imagined! (1) Triangle inequality theorem Triangle inequality theorem Triangle inequality theorem (2) Perpendicular bisectors Circumcenter of a triangle Circumcenter of a right triangle […]

Absolute value equations, functions, and inequalities (Khan Academy)

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Learn how to solve absolute value equations, how to graph absolute value functions, and how to solve absolute value inequalities. (1) Solving absolute value equations Intro to absolute value equations and graphs Solving absolute value equations: two solutions Solving absolute value equations: one solution Solving absolute value equations: no solution Solve absolute value equations (2) […]

Two-variable linear inequalities (Khan Academy)

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In this topic, we study inequalities like x+2y>5 and graph them. This helps us see their solutions. We also explore systems of inequalities (multiple inequalities at the same time) and use them to describe real-world situations. (1) Checking solutions of two-variable inequalities Testing solutions to inequalities Test solutions to inequalities Test solutions to inequalities: graphically […]

One-variable linear inequalities (Khan Academy)

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Learn how to solve linear inequalities with a single variable. For example, solve -3(x+1)>2x-7. Learn how to solve compound inequalities. For example, solve 2x+1>3 AND -x-5

Geometry (Khan Academy)

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Geometric shapes are all around us. The world is built with them. In this series of tutorials and exercises you’ll become familiar with Euclidean geometry and terms like segments, scale drawings, parts of a circle, area, volume, angles, and geometric figures. (1) Area and circumference of circles Radius, diameter, circumference & π Labeling parts of […]

Expressions, equations, & inequalities (Khan Academy)

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Bring on the algebra! Learn how to manipulate expressions and solve equations and inequalities. (1) Combining like terms Intro to combining like terms Simplifying expressions Combining like terms challenge problem Combining like terms with negative coefficients Combining like terms with negative coefficients & distribution Simplifying expressions with rational numbers Combining like terms with rational coefficients […]

Equations & inequalities introduction (Khan Academy)

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Learn about equations and inequalities that have variables in them. These tutorials focus on solving equations and understanding solutions to inequalities. (1) Algebraic equations basics Variables, expressions, & equations Testing solutions to equations Intro to equations Testing solutions to equations (2) One-step equations intuition Same thing to both sides of equations Representing a relationship with […]

Negative numbers (Khan Academy)

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Negative numbers are a necessary part of our understanding of mathematics and the world. The idea of anything “negative” is often seen as “bad.” Negative numbers are not only good, but they’re fun! Walk through this tutorial with us and we’ll show you how they are defined, interpreted, and applied. Absolute value is a type […]