• #### Trigonometric Ratios: Cosine - Problem 2

##### Math›Trigonometry›Basic Trigonometry
How to find the length of a hypotenuse in a right triangle, given a side length.
• #### Trigonometric Ratios: Tangent - Problem 1

##### Math›Trigonometry›Basic Trigonometry
How to find the length of a side in a right triangle using the tangent ratio.
• #### The Law of Cosines - Problem 2

##### Math›Trigonometry›Basic Trigonometry
How to use the law of cosines to find a missing angle given three sides in a triangle.
• #### The Law of Cosines - Problem 2

##### Math›Geometry›Basic Trigonometry
How to use the law of cosines to find a missing angle given three sides in a triangle.
• #### Area of Regular Polygons - Problem 4

##### Math›Geometry›Area
How to find the area of a regular hexagon given only the length of the apothem.
• #### Simplifying Radical Expressions - Problem 3

##### Math›Algebra›Radical Expressions and Equations
Simplifying radicals in the context of using the Pythagorean Theorem to find a missing side length of a right triangle.
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• #### Trigonometric Ratios: Tangent - Problem 1

##### Math›Precalculus›Basic Trigonometry
How to find the length of a side in a right triangle using the tangent ratio.
• #### Polygons - Concept

##### Math›Geometry›Geometry Building Blocks
How to define a polygon, how to distinguish between concave and convex polygons, how to name polygons.
• #### Isosceles Triangles - Problem 1

##### Math›Geometry›Triangles
How to solve for the side length and base angle measures of an isosceles triangle.
• #### Special Isosceles Triangle Properties - Concept

##### Math›Geometry›Triangles
How to identify a segment from the vertex angle in an isosceles triangle to the opposite side.
• #### Area and Perimeter of Rectangles - Problem 2

##### Math›Pre-Algebra›Introductory Geometry
Finding decimal approximations and exact areas and perimeters for parallelograms with square root side lengths
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• #### Types of Triangles - Concept

##### Math›Geometry›Geometry Building Blocks
How to classify a triangle based on its side lengths and angle measures.
• #### Surface Area of Pyramids - Problem 1

##### Math›Geometry›Area
How to calculate the surface area of a square pyramid, given the side length and height.
• #### Trigonometric Ratios: Cosine - Problem 2

##### Math›Precalculus›Basic Trigonometry
How to find the length of a hypotenuse in a right triangle, given a side length.
• #### Trigonometric Ratios: Sine - Problem 1

##### Math›Trigonometry›Basic Trigonometry
How to find the sine of two angles in a right triangle given two side lengths.
• #### Trigonometric Ratios: Sine - Problem 1

##### Math›Geometry›Basic Trigonometry
How to find the sine of two angles in a right triangle given two side lengths.
• #### Trapezoid Midsegment Properties - Problem 2

##### Math›Geometry›Polygons
How to find the length of the segments that divide the sides of a triangle into three congruent segments.
• #### Trigonometric Ratios: Sine - Problem 1

##### Math›Precalculus›Basic Trigonometry
How to find the sine of two angles in a right triangle given two side lengths.
• #### Angles: Types and Labeling - Concept

##### Math›Geometry›Geometry Building Blocks
How to label an angle and how to differentiate between acute, right, obtuse, and straight angles.
• #### Solving Quadratic Equations by Factoring - Problem 15

##### Math›Algebra›Quadratic Equations and Functions
Explanatin of why it is valid to divide both sides of a quadratic equation by a constant, but not by a variable
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