• #### Triangle Side and Angle Inequalities - Problem 3

##### Math›Geometry›Triangles
How to list the sides of adjacent triangles from shortest to longest given the measures of some interior angles.
• #### Iron Triangles

##### Test Prep›AP US Government›AP US Government Videos
How is public policy made? Who controls the bureaucracy?
• #### Area of Triangles - Concept

##### Math›Geometry›Area
How to derive the area of a triangle formula using the rectangle area formula.
• #### 30-60-90 Triangles - Problem 4

##### Math›Geometry›Pythagorean Theorem
How to find the area of an equilateral triangle given only a side length.
• #### 30-60-90 Triangles - Problem 4

##### Math›Trigonometry›Pythagorean Theorem
How to find the area of an equilateral triangle given only a side length.
• #### Triangle Midsegment Properties - Concept

##### Math›Geometry›Polygons
How to define a triangle midsegment and describe its special properties.
• #### Types of Triangles - Concept

##### Math›Geometry›Geometry Building Blocks
How to classify a triangle based on its side lengths and angle measures.
• #### Triangle Midsegment Properties - Problem 1

##### Math›Geometry›Polygons
How to solve for lengths in a triangle with two midsegments.
• #### Triangle Midsegment Properties - Problem 2

##### Math›Geometry›Polygons
How to solve for angles in a triangle created by a midsegment.
• #### Area of Triangles - Problem 2

##### Math›Geometry›Area
How to find an unknown variable, x, when the area is given and the base and height of a triangle is given in terms of x.
• #### Corresponding Parts of Similar Triangles - Concept

##### Math›Geometry›Similarity
How to relate corresponding altitudes, medians and angle bisectors in similar triangles.
• #### Corresponding Parts of Similar Triangles - Problem 3

##### Math›Geometry›Similarity
How to find the length of a median using similar triangles.
• #### Corresponding Parts of Similar Triangles - Problem 2

##### Math›Geometry›Similarity
How to find the length of an altitude using similar triangles.
• #### Corresponding Parts of Similar Triangles - Problem 1

##### Math›Geometry›Similarity
How to find the length of an angle bisector using similar triangles.
• #### HL - Problem 3

##### Math›Geometry›Triangles
How to solve for a variable to make two right triangles congruent using the HL shortcut.
• #### 30-60-90 Triangles - Concept

##### Math›Geometry›Pythagorean Theorem
How to find the legs and hypotenuse in 30-60-90 triangles when given: the short leg, the long leg, or the hypotenuse.
• #### Constructing a Triangle Midsegment - Concept

##### Math›Geometry›Constructions
How to define a midsegment in a triangle.
• #### Constructing a Triangle Midsegment - Problem 1

##### Math›Geometry›Constructions
How to construct a midsegment in a triangle.
• #### Using Sine to Calculate the Area of a Triangle - Problem 1

##### Math›Precalculus›Basic Trigonometry
How to calculate the area of a triangle using two sides and an included angle.
• #### 30-60-90 Triangles - Problem 2

##### Math›Geometry›Pythagorean Theorem
How to find the short leg and hypotenuse in a 30-60-90 triangle given the long leg.