# similar triangles   89 videos

• #### 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
• #### Similar Triangles in Circles and Right Triangles

##### GeometrySimilarity

How to determine if two triangles in a circle are similar and how to prove that three similar triangles exist in a right triangle with an altitude.

similar inscribed angles intercepted arc right angle circle
• #### Similarity Shortcuts

##### GeometrySimilarity

How to determine if two triangles are similar using a shortcut.

similar triangles AA SAS SSS proportion congruence
• #### Similar Triangles

##### Pre-AlgebraIntroductory Geometry

Overview of similarity: congruent angles, proportional corresponding sides

• #### Similarity and Area Ratios

##### GeometrySimilarity

How to convert between length and area ratios of similar polygons

polygons similar area ratios
• #### Indirect Measurement

##### GeometrySimilarity

How to use similar triangles to measure the height of objects.

indirect measurement similar triangles measurement
• #### Properties of Similar Polygons

##### GeometrySimilarity

How to identify if two figures are similar.

similar figures corresponding angles congruence corresponding sides proportional
• #### Similarity and Volume Ratios

##### GeometrySimilarity

How to identify if two solids are similar and how to convert 1D ratios to surface area and volume ratios.

similarity volume ratios surface area
• #### Proportional Segments Between Parallel Lines

##### GeometrySimilarity

How to prove two triangles are similar using a line parallel to a base.

parallel lines triangles similar triangles proportion
• #### Area of Triangles

##### GeometryArea

How to derive the area of a triangle formula using the rectangle area formula.

area triangles rectangles altitude
• #### Types of Triangles

##### GeometryGeometry Building Blocks

How to classify a triangle based on its side lengths and angle measures.

equiangular equilateral isosceles right acute obtuse triangles
• #### 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
• #### Iron Triangles

##### AP US GovernmentAP US Government Videos

How is public policy made? Who controls the bureaucracy?

Iron triangles bureaucracy
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