• #### 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.
• #### 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.
• #### 3-D Solid Properties - Concept

##### Math›Geometry›Volume
How to label the parts of a prism, how to distinguish between an oblique and a right prism.
• #### Inverse Trigonometric Functions - Problem 1

##### Math›Geometry›Basic Trigonometry
How to use inverse trig functions to find angles in right triangles.
• #### Inverse Trigonometric Functions - Problem 1

##### Math›Precalculus›Basic Trigonometry
How to use inverse trig functions to find angles in 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.
• #### Inverse Trigonometric Functions - Problem 1

##### Math›Trigonometry›Basic Trigonometry
How to use inverse trig functions to find angles in right triangles.
• #### Pythagorean Theorem Proofs - Problem 2

##### Math›Trigonometry›Pythagorean Theorem
How to use the Pythagorean Theorem to determine if a triangle is acute, right, or obtuse, given the lengths of the triangle.
• #### Using the Pythagorean Theorem to find a Missing Hypotenuse - Concept

##### Math›Trigonometry›Pythagorean Theorem
How to calculate the hypotenuse in a right triangle given the lengths of the legs using the Pythagorean Theorem.
• #### Converse of the Pythagorean Theorem - Problem 2

##### Math›Geometry›Pythagorean Theorem
How to use the Pythagorean Theorem to determine if a triangle is acute, right, or obtuse, given the lengths of the triangle.
• #### Approximating Area Using Rectangles - Problem 1

##### Math›Calculus›The Definite Integral
How to estimate the area between a curve and the x-axis with left- and right-hand sums.
• #### Approximating Area Using Rectangles - Problem 3

##### Math›Calculus›The Definite Integral
How to estimate the area between a curve and the x-axis with left- and right-hand sums.
• #### Using the Pythagorean Theorem to find a Missing Hypotenuse - Concept

##### Math›Geometry›Pythagorean Theorem
How to calculate the hypotenuse in a right triangle given the lengths of the legs using the Pythagorean Theorem.
• #### Converse of the Pythagorean Theorem - Problem 2

##### Math›Trigonometry›Pythagorean Theorem
How to use the Pythagorean Theorem to determine if a triangle is acute, right, or obtuse, given the lengths of the triangle.
• #### Civil Liberties 101

##### Test Prep›AP US Government›AP US Government Videos
How can we balance individual rights with the public good?
• #### Approximating Area Using Rectangles - Problem 2

##### Math›Calculus›The Definite Integral
How to estimate the area under a curve, f = x^2 +1, with left- and right-hand sums.
• #### Using the Pythagorean Theorem to find a Missing Hypotenuse - Problem 1

##### Math›Trigonometry›Pythagorean Theorem
How to calculate the hypotenuse in a right triangle given the lengths of the legs using the Pythagorean Theorem.
• #### Using the Pythagorean Theorem to find a Missing Hypotenuse - Problem 1

##### Math›Geometry›Pythagorean Theorem
How to calculate the hypotenuse in a right triangle given the lengths of the legs using the Pythagorean Theorem.
• #### One-Sided Limits - Problem 2

##### Math›Calculus›Limits and Continuity
How to show that the limit does not exist by showing that the left-hand limit does not equal the right-hand limit.
• #### One-Sided Limits - Problem 1

##### Math›Calculus›Limits and Continuity
How to use one-sided limits to show that the limit exists by showing that the the left-hand limit must equal the right-hand limit.