• #### Trigonometric Ratios: Sine - Concept

##### Math›Precalculus›Basic Trigonometry
How to define the sine ratio and identify the sine of an angle in a right triangle.
• #### Trigonometric Ratios: Sine - Problem 2

##### Math›Precalculus›Basic Trigonometry
How to find the length of a base in an isosceles triangle given the vertex angle and a leg length.
• #### Trigonometric Ratios: Cosine - Problem 1

##### Math›Precalculus›Basic Trigonometry
How to find the cosine of an angle in a right triangle.
• #### 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: Tangent - Problem 3

##### Math›Precalculus›Basic Trigonometry
How to find the height of an isosceles triangle using tangent ratios.
• #### Trigonometric Ratios: Tangent - Problem 2

##### Math›Precalculus›Basic Trigonometry
How to find the tangent of an angle in an isosceles right triangle.
• #### Trigonometric Ratios: Tangent - Concept

##### Math›Precalculus›Basic Trigonometry
How to define the tangent ratio and identify the tangent of an angle in a right triangle.
• #### Trigonometric Ratios: Tangent - Problem 2

##### Math›Geometry›Basic Trigonometry
How to find the tangent of an angle in an isosceles right triangle.
• #### Trigonometric Ratios: Tangent - Problem 3

##### Math›Geometry›Basic Trigonometry
How to find the height of an isosceles triangle using tangent ratios.
• #### Inverse Trigonometric Functions - Concept

##### Math›Precalculus›Basic Trigonometry
How to use inverse trig functions to find angles in right triangles.
• #### The Law of Sines - Problem 1

##### Math›Precalculus›Basic Trigonometry
How to find the length of a triangle given two angles and a side, using the law of sines.
• #### Duplicating a Line Segment - Problem 3

##### Math›Geometry›Constructions
How to construct an equilateral triangle given one segment.
• #### 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.
• #### 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.
• #### Trigonometric Ratios: Tangent - Problem 1

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

##### Math›Geometry›Pythagorean Theorem
How to identify a polygon (a triangle in this problem) as isosceles, equilateral, or scalene using the distance formula.
• #### Distance Formula - Problem 2

##### Math›Trigonometry›Pythagorean Theorem
How to identify a polygon (a triangle in this problem) as isosceles, equilateral, or scalene using the distance formula.
• #### Center and Apothem of Regular Polygons - Concept

##### Math›Geometry›Area
How to define the apothem and center of a polygon; how to divide a regular polygon into congruent triangles.
• #### Solving Formulas - Concept

##### Math›Geometry›Area
How to strategize about solving formulas for variables; how to solve the area of a rectangle formula for base and height; how to solve the area of a triangle formula for base and for height.