ratios   34 videos

• Ratios

AlgebraSolving Equations

How to write ratios to compare two quantities.

ratio fraction
• Similarity and Volume Ratios

GeometrySimilarity

How to identify if two solids are similar and how to convert 1D ratios to surface area and volume ratios.

similarity volume ratios surface area
• Similarity and Area Ratios

GeometrySimilarity

How to convert between length and area ratios of similar polygons

polygons similar area ratios
• Trigonometric Ratios: Sine

GeometryBasic Trigonometry

How to define the sine ratio and identify the sine of an angle in a right triangle.

trigonometry ratio right triangle sine SOH CAH TOA
• Trigonometric Ratios: Cosine

GeometryBasic Trigonometry

How to define the cosine ratio and identify the cosine of an angle in a right triangle.

trigonometry ratio right triangle sine SOH CAH TOA
• Trigonometric Ratios: Tangent

GeometryBasic Trigonometry

How to define the tangent ratio and identify the tangent of an angle in a right triangle.

trigonometry ratio right triangle sine SOH CAH TOA
• Trigonometric Ratios: Sine

TrigonometryBasic Trigonometry

How to define the sine ratio and identify the sine of an angle in a right triangle.

trigonometry ratio right triangle sine SOH CAH TOA
• Trigonometric Ratios: Cosine

TrigonometryBasic Trigonometry

How to define the cosine ratio and identify the cosine of an angle in a right triangle.

trigonometry ratio right triangle sine SOH CAH TOA
• Trigonometric Ratios: Tangent

TrigonometryBasic Trigonometry

How to define the tangent ratio and identify the tangent of an angle in a right triangle.

trigonometry ratio right triangle sine SOH CAH TOA
• Trigonometric Ratios: Sine

PrecalculusBasic Trigonometry

How to define the sine ratio and identify the sine of an angle in a right triangle.

trigonometry ratio right triangle sine SOH CAH TOA
• Trigonometric Ratios: Cosine

PrecalculusBasic Trigonometry

How to define the cosine ratio and identify the cosine of an angle in a right triangle.

trigonometry ratio right triangle sine SOH CAH TOA
• Trigonometric Ratios: Tangent

PrecalculusBasic Trigonometry

How to define the tangent ratio and identify the tangent of an angle in a right triangle.

trigonometry ratio right triangle sine SOH CAH TOA
• Ratios and unites

Pre-AlgebraFractions and MIxed Numbers

Definitions and notation of ratios, and when we use them

• Angle Bisectors and Opposite Side Ratios

GeometrySimilarity

How to relate the sides of an angle bisected and the lengths of the opposite side.

angle bisector opposite side ratio proportion

• Solving Proportions

GeometrySimilarity

How to solve a simple proportion.

ratio proportion
• Definition of Slope

AlgebraLinear Equations and Their Graphs

How to understand the idea of slope.

slope change ratio fraction
• Finding the Slope of a Line from 2 Points

AlgebraLinear Equations and Their Graphs

How to find the slope if you're given 2 points.

slope point ratio
• The Law of Sines

GeometryBasic Trigonometry

How to define the law of sines.

law of sines ratios triangles
• The Law of Cosines

GeometryBasic Trigonometry

How to define and use the law of cosines.

law of cosines ratios triangles