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Adding and Subtracting Angles: 4.MD.7
By TenmarksAmazon
Recognize angle measure as additive. When an angle is decomposed into non-overlapping parts, the angle measure of the whole is the sum of the angle measures of the parts. Solve addition and subtraction problems to find unknown angles on a diagram in real world and mathematical problems
Properties of a Rhombus | MathHelp.com
By MathHelp.com
This lesson covers evaluating expressions. Students learn to evaluate expressions by substituting the given integers in for the variables in the given expression, then simplifying. Students also learn to use parentheses when substituting.
Parallel Lines | MathHelp.com
By MathHelp.com
This lesson covers imaginary numbers. Students learn that the imaginary number "i" is equal to the square root of -1, which means that i^2 is equal to (the square root of -1) squared, which equals -1. Students also learn to simplify imaginary numbers. For example, to simplify the square root of -81, think of it as the square root of -1 times the square root of 81, which simplifies to i times 9, or 9i. To simplify 11/8i, the first step is to get rid of the "i" in the denominator by multiplying both the numerator and the denominator of the fraction by i, to get 11i/8i^2, and remember that i^2 = -1, so we have 11i/8(-1), or 11i/-8, or -11i/8.
10th grade math | MathHelp.com
By MathHelp.com
MathHelp.com is a great way to learn how to do Algebra with the help of a personal math teacher inside every lesson! Whether you're taking Algebra in school or preparing for a standardized test that requires in-depth knowledge of Algebra, our custom math courses are the perfect way to learn the Algebra you need to know.
14 - Reference Angles Explained - Sine, Cosine & Unit Circle - Part 1
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
Addition and subtraction with number lines
By Khan Academy
Sal figures out which number line matches up with a 2-digit addition or subtraction problem.
11 - Learn ArcSin, ArcCos & ArcTan (Inverse Sin, Cos & Tan) - Part 1
By Math and Science
Quality Math And Science Videos that feature step-by-step example problems!
Addition and subtraction with number lines | 2nd grade | Khan Academy
By Khan Academy
Sal figures out which number line matches up with a 2-digit addition or subtraction problem.