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: https://www.youtube.com/watch?v=oeO8f0taQDA Acute, Obtuse, Right, & Straight Angles: https://www.youtube.com/watch?v=VjRXfemAbuc Decimal Degrees to DMS Formula: https://www.youtube.com/watch?v=W9kousU6AI0 Clock to Angle Problems: https://www.youtube.com/watch?v=LEHYr0XfSyI Angle Bisector Theorem - Midpoints: https://www.youtube.com/watch?v=2I7ghedeoec Converse, Inverse, & Contrapositive: https://www.youtube.com/watch?v=TCBu8PD4Lls Geometry Probability - Length & Area: https://www.youtube.com/watch?v=DeH5aHWxEaI Perpendicular Lines, Rays, & Segments: https://www.youtube.com/watch?v=-QFNMEnfRQA Complementary & Supplementary Angles: https://www.youtube.com/watch?v=MKgsObfVHmk Addition & Subtraction Equality Property: https://www.youtube.com/watch?v=RslDIFh_kG8 Multiplication & Division Property Equality: https://www.youtube.com/watch?v=nYCrcq5YDvQ Transitive Property of Congruence: https://www.youtube.com/watch?v=H3hvDbxntfo Triangles - Basic Introduction: https://www.youtube.com/watch?v=DdAwGinauoI Alternate Interior & Exterior Angles: https://www.youtube.com/watch?v=e4o7X6LyX-I ______________________________________________________________________________________________ 2 Column Proofs of Congruent Segments: https://www.youtube.com/watch?v=cboityRIf4Q 2 Column Proofs of Angles: https://www.youtube.com/watch?v=kXcG6oYh3i8 Triangle Congruence - SSS, SAS, ASA: https://www.youtube.com/watch?v=jWHOF6cFbpw CPCTC - 2 Column Proofs With Triangles: https://www.youtube.com/watch?v=eq1frp_ZyP8 Median of a Triangle Formula: https://www.youtube.com/watch?v=_JdkDR4R8E4 Altitude of a Triangle - Orthocenter: https://www.youtube.com/watch?v=oJyTKVcE4iM Triangles, Medians, & Altitudes - Proofs: https://www.youtube.com/watch?v=ZJ_gqFidInk 2 Column Proofs - Isosceles Triangles: https://www.youtube.com/watch?v=6Yx923Ocoh4 Angle Side Theorem - 2 Column Proofs: https://www.youtube.com/watch?v=mwcH3nhXtPQ Hypotenuse Leg Theorem - HL Postulate: https://www.youtube.com/watch?v=DKSTjS0n3mY ______________________________________________________________________________________________ Detour Proofs - Double Triangle Congruence: https://www.youtube.com/watch?v=1HOrB5yvEl0 The Midpoint Formula: https://www.youtube.com/watch?v=pzDfd8NXRXk Missing Diagrams - 2 Column Proofs: https://www.youtube.com/watch?v=IaqzuGweGZ8 Right Angle Theorem - SSS & SAS: https://www.youtube.com/watch?v=FRbFMp8mg1s Perpendicular Bisector Theorem: https://www.youtube.com/watch?v=xyNBZuUjmSE Altitude, Median, Midpoint & P. Bisector: https://www.youtube.com/watch?v=SyzkgBjXtIs Parallel & Perpendicular Lines - Slope: https://www.youtube.com/watch?v=bq3fKZVTflU Indirect Proofs - Example Problems: https://www.youtube.com/watch?v=GawWGpnjy1c Proving Parallel Lines With Proofs: https://www.youtube.com/watch?v=0eYzPVgylO8 The Exterior Angle Theorem: https://www.youtube.com/watch?v=ndqxxAUDF5Y Exterior Angle Inequality Theorem: https://www.youtube.com/watch?v=rfMZwrq-wL8 ______________________________________________________________________________________________ Polygons: https://www.youtube.com/watch?v=E_-3ulbtcLk Quadrilaterals: https://www.youtube.com/watch?v=ogcH3eM5beM Parallelograms: https://www.youtube.com/watch?v=t42sLuns4Qs Rectangles - Special Quadrilaterals: https://www.youtube.com/watch?v=Ov4aTty67A8 Isosceles Trapezoids: https://www.youtube.com/watch?v=AlyWS8bG3kE ______________________________________________________________________________________________ Geometry Review - Study Guide: https://www.youtube.com/watch?v=KtZai86htng Geometry Final Exam Review Questions: https://www.youtube.com/watch?v=puxjcvBL2IE