## Triangles Video Lessons

Watch simple explanations of Triangles and related concepts. Browse through all study tools.

Never feel confused in Triangles class again! Our short 5-minute videos explain complicated Triangles concepts in a manner that's easy for you to understand. Additionally, transcripts and captions are available for your convenience. Every one of the lessons is followed by a quiz to make sure you've got the Triangles topics figured out.

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Watch simple explanations of Triangles and related concepts. Browse through all study tools.

How to Find the Area of a Triangle: Lesson for Kids

Measuring the Angles of Triangles: 180 Degrees

Congruency of Right Triangles: Definition of LA and LL Theorems

How to Identify Similar Triangles

30-60-90 Triangle: Theorem, Properties & Formula

Similar Polygons: Definition and Examples

Triangle Lesson for Kids: Definition & Facts

Using Sine to Find the Area of a Triangle

Properties of Congruent & Similar Solids

Congruency of Isosceles Triangles: Proving the Theorem

The HA (Hypotenuse Angle) Theorem: Proof, Explanation, & Examples

Identifying Parallel Lines in Geometric Shapes

Vertex Angle of an Isosceles Triangle

Similarity Transformations in Corresponding Figures

Explaining the Pythagorean Theorem with Models & Diagrams

Congruence in Geometric Shapes

Angles and Triangles: Practice Problems

Congruent in Math: Definition & Examples

The HL (Hypotenuse Leg) Theorem: Definition, Proof, & Examples

What is a Scalene Triangle? - Definition, Properties & Examples

Proportional Relationships in Triangles

Properties of Right Triangles: Theorems & Proofs

What Are Congruent Figures? - Definition & Examples

Right Triangle Altitudes: Applications

Constructing Similar Polygons

Side-Angle-Side (SAS) Triangle: Definition, Theorem & Formula

Triangles: Definition and Properties

Applications of Similar Triangles

45-45-90 Triangle: Theorem, Rules & Formula

Similarity in Geometric Shapes

Finding Distance with the Pythagorean Theorem

Congruence Proofs: Corresponding Parts of Congruent Triangles

How to Find the Altitude of a Triangle

Congruent Segments: Definition & Examples

How to Find the Area of an Isosceles Triangle

Hypotenuse: Definition & Formula

Congruent Angles: Definition & Examples

Similar Figures: Definition & Examples

The Pythagorean Theorem: Practice and Application

Triangle Congruence Postulates: SAS, ASA & SSS

The Transitive Property of Similar Triangles

Median of a Triangle: Definition & Formula

Triangles in Coordinate Planes & Proofs

Applying Scale Factors to Perimeter, Area, and Volume of Similar Figures

Shapes with Right Angles

How to Find the Circumradius of a Triangle

What Are Triangular Numbers? - Definition, Formula & Examples

How to Find the Hypotenuse of a Right Triangle Using the Pythagorean Theorem

Special Right Triangles: Types and Properties

How to Find the Height of a Triangle

How to Find the Area of an Equilateral Triangle

Special Triangle: Rules & Formulas

Congruent Sides of a Triangle: Definition & Overview

How to Find Shorter Sides on a Right Triangle Using the Pythagorean Theorem

Properties of Congruent and Similar Shapes

Constructing Inscribed & Circumscribed Triangles

Similar Triangles & the AA Criterion

The Pythagorean Theorem: Converse and Special Cases

Orthocenter in Geometry: Definition & Properties

What is an Isosceles Triangle? - Definition, Properties & Theorem