Triangles

This math video provides an introduction into triangles. It explains the classification of triangles based on their angle measure and the number of congruent sides. Examples include equilateral triangles, scalene triangles, isosceles, right, acute, and obtuse triangles. This video also contains practice problems on solving the angle measure of triangles.

Lines, Rays, Line Segments, & Angles:    • Lines, Rays, Line Segments, Points, Angles...  
Acute, Obtuse, Right, & Straight Angles:    • Acute Obtuse Right & Straight Angles - Com...  
Decimal Degrees to DMS Formula:    • Decimal Degrees to DMS Formula -  Converti...  
Clock to Angle Problems:    • Clock Aptitude Reasoning Tricks & Problems...  
Angle Bisector Theorem - Midpoints:    • Angle Bisector Theorem - Midpoints & Line ...  
Converse, Inverse, & Contrapositive:    • Converse, Inverse, & Contrapositive - Cond...  
Geometry Probability - Length & Area:    • Probability With Geometry - Length, Area &...  
Perpendicular Lines, Rays, & Segments:    • Perpendicular Lines, Slope, Rays, and Segm...  
Complementary & Supplementary Angles:    • Complementary Angles and Supplementary Ang...  
Addition & Subtraction Equality Property:    • Addition and Subtraction Property of Equality  
Multiplication & Division Property Equality:    • Multiplication and Division Property of Eq...  
Transitive Property of Congruence:    • Transitive Property of Congruence & Substi...  
Triangles - Basic Introduction:    • Triangles  
Alternate Interior & Exterior Angles:    • Parallel and Perpendicular Lines, Transver...  
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2 Column Proofs of Congruent Segments:    • Two Column Proofs of Congruent Segments - ...  
2 Column Proofs of Angles:    • Geometry, Two Column Proofs of Angles - Ad...  
Triangle Congruence - SSS, SAS, ASA:    • Triangle Congruence Theorems, Two Column P...  
CPCTC - 2 Column Proofs With Triangles:    • CPCTC Geometry Proofs Made Easy, Triangle ...  
Median of a Triangle Formula:    • Median of a Triangle Formula, Example Prob...  
Altitude of a Triangle - Orthocenter:    • Altitude of a Triangle - Finding The Ortho...  
Triangles, Medians, & Altitudes - Proofs:    • Two Column Proofs - Triangles, Medians and...  
2 Column Proofs - Isosceles Triangles:    • Geometry Proofs - Isosceles Triangles - SA...  
Angle Side Theorem - 2 Column Proofs:    • Angle Side / Base-Angle Theorem - Two Colu...  
Hypotenuse Leg Theorem - HL Postulate:    • Hypotenuse Leg Theorem - HL Postulate - Tw...  
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Detour Proofs - Double Triangle Congruence:    • Detour Proofs - Double Triangle Congruence  
The Midpoint Formula:    • Midpoint Formula  
Missing Diagrams - 2 Column Proofs:    • Missing Diagrams With Two Column Proofs  
Right Angle Theorem - SSS & SAS:    • Right Angle Theorem - SSS & AAS - Two Colu...  
Perpendicular Bisector Theorem:    • Perpendicular Bisector of a Line Segment a...  
Altitude, Median, Midpoint & P. Bisector:    • Altitudes, Medians, Midpoints, Angle & Per...  
Parallel & Perpendicular Lines - Slope:    • Finding The Slope Given Two Points - Paral...  
Indirect Proofs - Example Problems:    • Indirect Proofs, Practice Problems, Two Co...  
Proving Parallel Lines With Proofs:    • Proving Parallel Lines With Two Column Pro...  
The Exterior Angle Theorem:    • Exterior Angle Theorem For Triangles, Prac...  
Exterior Angle Inequality Theorem:    • Exterior Angle Inequality Theorem With Two...  
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Polygons:    • Polygons  
Quadrilaterals:    • Quadrilaterals - Geometry  
Parallelograms:    • Parallelograms - Geometry  
Rectangles - Special Quadrilaterals:    • Rectangles - Properties of Parallelograms,...  
Isosceles Trapezoids:    • Isosceles Trapezoids  
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Geometry Review - Study Guide:    • Geometry Introduction - Basic Overview - R...  
Geometry Final Exam Review Questions:    • Geometry Final Exam Review - Study Guide