This video tutorial provides a basic introduction into 45-45-90 right triangles and explains how to use this special reference triangle to find the value of the missing sides of another triangle. This information is useful for students taking trigonometry or geometry in high school and college and for those studying the sat math and act math sections. This video contains plenty of examples and practice problems. Polygons: https://www.youtube.com/watch?v=E_-3ulbtcLk Quadrilaterals: https://www.youtube.com/watch?v=ogcH3eM5beM Points, Lines, Planes, & Segments: https://www.youtube.com/watch?v=dDWjhRfBsKM Similar Triangles: https://www.youtube.com/watch?v=YiFwvAFk-xs Pythagorean Theorem: https://www.youtube.com/watch?v=d8EA5TxGzcY _________________________________ The Distance Formula: https://www.youtube.com/watch?v=YDvUy5VYm9E Distance Between 2 Points - 3D: https://www.youtube.com/watch?v=0c6cP2zLC2c Special Right Triangles - 30 60 90: https://www.youtube.com/watch?v=p70UBGCHZrQ Trigonometric Ratios: https://www.youtube.com/watch?v=9-eHMMpQC2k _________________________________ Angle of Elevation Word Problems: https://www.youtube.com/watch?v=uyKvSe6Ltgs Finding The Missing Side of a triangle: https://www.youtube.com/watch?v=tielQ3ejh70 Finding The Missing Angle of a Triangle: https://www.youtube.com/watch?v=4Dv5IFqATrc Two Triangle Trigonometry Problems: https://www.youtube.com/watch?v=OTP885mApV8 How To Find The Area of a Rectangle: https://www.youtube.com/watch?v=M8JdRHeQBW8 ________________________________ Final Exams and Video Playlists: https://www.video-tutor.net/ Full-Length Videos and Worksheets: https://www.patreon.com/MathScienceTutor/collections