# right triangle trigonometry   110 videos

• #### 45-45-90 Triangles

##### GeometryPythagorean Theorem

How to find the length of a leg or hypotenuse in a 45-45-90 triangle using the Pythagorean Theorem.

isosceles right triangle leg hypotenuse Pythagorean theorem square root
• #### 45-45-90 Triangles

##### TrigonometryPythagorean Theorem

How to find the length of a leg or hypotenuse in a 45-45-90 triangle using the Pythagorean Theorem.

isosceles right triangle leg hypotenuse Pythagorean theorem square root
• #### Converse of the Pythagorean Theorem

##### GeometryPythagorean 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.

right triangle leg hypotenuse converse Pythagorean triples
• #### Converse of the Pythagorean Theorem

##### TrigonometryPythagorean 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.

right triangle leg hypotenuse converse Pythagorean triples
• #### Triangle Angle Sum

##### GeometryTriangles

How to apply the triangle angle sum theorem.

triangle angle sum theorem 180 degrees
• #### Pascal's Triangle

##### PrecalculusTopics in Discrete Math

How to use Pascal's triangle.

zero product property factoring constant
• #### Pascal's Triangle

##### Algebra 2Polynomials

How to use Pascal's triangle.

zero product property factoring constant
• #### Using Sine to Calculate the Area of a Triangle

##### GeometryBasic Trigonometry

How to calculate the area of any triangle using two sides and an included angle.

area of a triangle sine
• #### Using Sine to Calculate the Area of a Triangle

##### TrigonometryBasic Trigonometry

How to calculate the area of any triangle using two sides and an included angle.

area of a triangle sine
• #### Using Sine to Calculate the Area of a Triangle

##### PrecalculusBasic Trigonometry

How to calculate the area of any triangle using two sides and an included angle.

area of a triangle sine
• #### Special Isosceles Triangle Properties

##### GeometryTriangles

How to identify a segment from the vertex angle in an isosceles triangle to the opposite side.

isosceles triangle angle bisector altitude median
• #### Triangle Midsegment Properties

##### GeometryPolygons

How to define a triangle midsegment and describe its special properties.

midsegment triangle parallel bases midpoint third side
• #### Corresponding Parts of Similar Triangles

##### GeometrySimilarity

How to relate corresponding altitudes, medians and angle bisectors in similar triangles.

similar triangles altitude median angle bisector proportional
• #### Iron Triangles

##### AP US GovernmentAP US Government Videos

How is public policy made? Who controls the bureaucracy?

Iron triangles bureaucracy
• #### Constructing Altitudes

##### GeometryConstructions

How to define an altitude and draw them on acute, right, and obtuse triangles.

altitudes perpendicular segment vertex opposite side obtuse acute right triangles
• #### Synthesizer: Voting Rights Time line

##### AP US GovernmentAP US Government Review
Using a graphic organizer to review voting rights
• #### Constructing a Triangle Midsegment

##### GeometryConstructions

How to define a midsegment in a triangle.

midpoint segment median
• #### Using the Pythagorean Theorem to find a Missing Hypotenuse

##### GeometryPythagorean Theorem

How to calculate the hypotenuse in a right triangle given the lengths of the legs using the Pythagorean Theorem.

Pythagorean theorem leg hypotenuse right triangle
• #### Using the Pythagorean Theorem to find a Missing Hypotenuse

##### TrigonometryPythagorean Theorem

How to calculate the hypotenuse in a right triangle given the lengths of the legs using the Pythagorean Theorem.

Pythagorean theorem leg hypotenuse right triangle
• #### Isosceles Triangles

##### GeometryTriangles

How to define isosceles triangles, their components and how to determine their properties.

vertex angle leg base base angle converse remote interior angles

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