• #### 45-45-90 Triangles - Problem 1

##### Math›Geometry›Pythagorean Theorem
How to find the hypotenuse in a 45-45-90 triangle given a leg with a length that contains a square root.
• #### 45-45-90 Triangles - Problem 3

##### Math›Geometry›Pythagorean Theorem
How to find the perimeter of a square given the length of its diagonal using 45-45-90 triangles.
• #### 45-45-90 Triangles - Problem 4

##### Math›Geometry›Pythagorean Theorem
How to calculate the area of a 45-45-90 triangle given only the length of the hypotenuse.
• #### 45-45-90 Triangles - Problem 3

##### Math›Trigonometry›Pythagorean Theorem
How to find the perimeter of a square given the length of its diagonal using 45-45-90 triangles.
• #### 45-45-90 Triangles - Problem 4

##### Math›Trigonometry›Pythagorean Theorem
How to calculate the area of a 45-45-90 triangle given only the length of the hypotenuse.
• #### Types of Triangles - Concept

##### Math›Geometry›Geometry Building Blocks
How to classify a triangle based on its side lengths and angle measures.
• #### 45-45-90 Triangles - Problem 2

##### Math›Trigonometry›Pythagorean Theorem
How to find the length of a leg in a 45-45-90 given the hypotenuse.
• #### 45-45-90 Triangles - Problem 2

##### Math›Geometry›Pythagorean Theorem
How to find the length of a leg in a 45-45-90 given the hypotenuse.
• #### Converse of the Pythagorean Theorem - Concept

##### Math›Geometry›Pythagorean Theorem
How to use the converse of the Pythagorean Theorem to determine if a triangle is a right triangle, how to use Pythagorean triples to memorize the lengths of certain right triangles.
• #### Converse of the Pythagorean Theorem - Concept

##### Math›Trigonometry›Pythagorean Theorem
How to use the converse of the Pythagorean Theorem to determine if a triangle is a right triangle, how to use Pythagorean triples to memorize the lengths of certain right triangles.
• #### Converse of the Pythagorean Theorem - Problem 1

##### Math›Trigonometry›Pythagorean Theorem
How to use the converse of the Pythagorean Theorem to determine if a triangle is a right triangle given the lengths of the triangle.
• #### Converse of the Pythagorean Theorem - Problem 1

##### Math›Geometry›Pythagorean Theorem
How to use the converse of the Pythagorean Theorem to determine if a triangle is a right triangle given the lengths of the triangle.
• #### HL - Problem 1

##### Math›Geometry›Triangles
How to use the hypotenuse-leg (HL) shortcut to determine the congruence of vertical triangles and how to correctly denote the congruence.
• #### Trigonometric Ratios: Tangent - Problem 2

##### Math›Geometry›Basic Trigonometry
How to find the tangent of an angle in an isosceles right triangle.
• #### Trigonometric Ratios: Cosine - Problem 2

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

##### Math›Geometry›Basic Trigonometry
How to define the tangent ratio and identify the tangent of an angle in a right triangle.
• #### Trigonometric Ratios: Sine - Concept

##### Math›Geometry›Basic Trigonometry
How to define the sine ratio and identify the sine of an angle in a right triangle.
• #### 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.
• #### Inverse Trigonometric Functions - Concept

##### Math›Precalculus›Basic Trigonometry
How to use inverse trig functions to find angles in right triangles.
• #### Inverse Trigonometric Functions - Concept

##### Math›Geometry›Basic Trigonometry
How to use inverse trig functions to find angles in right triangles.