An explanation of a segment of a circle as a region bounded by an arc and its chord, how the area of a segment is equal to the area of a sector minus the area of a triangle within that sector. We have two examples of finding the area of a segment of a circle and rounding it to the nearest hundredth. Geometry 5.8b, 30°-60°-90° Triangle Theorem https://youtu.be/KLWEVm6SaEQ Geometry 12.3a, Sector of a circle & Sector area https://youtu.be/SkVnNGsOA8o Geometry 10.3b, Triangle Area Formulas unknown height, Heron's Formula https://youtu.be/N8gwjgfO2fE High School Geometry Playlist https://www.youtube.com/playlist?list=PLKi4WTp6PRGVBM1nPhwW1lTuxi32Q0IZ3 FOLLOW ME: TWITTER https://twitter.com/JoannsSchool FACEBOOK Message me! https://www.facebook.com/JoAnnsSchool/ MINDS Minds.com/joannsschool SUPPORT MY WORK: PATREON https://www.patreon.com/JoannsSchool PAYPAL https://www.paypal.com/cgi-bin/webscr?cmd=_s-xclick&hosted_button_id=KKAMABTBVDFNY YOUTUBE https://www.youtube.com/c/joannsschool ... https://www.youtube.com/watch?v=Tdxns7t0O1o

A plane is a flat surface that continues without end in all directions. Intersecting lines are lines in a plane that cross at exactly one point. Intersecting lines form four angles. Parallel lines are lines in a plane that are always the same distance apart. Parallel lines never intersect, they never cross or meet. Perpendicular lines are lines in a plane that form four right angles. Intersecting lines and perpendicular lines cross at one point. But, only perpendicular lines form four right angles. Parallel lines are never perpendicular because they never intersect. Two rays can be parallel because a ray is part of a line. Two rays can be perpendicular. We look at a figure and name a pair of perpendicular lines, and a pair of lines that appear to be parallel. We discuss how sometimes lines appear to be parallel, but they're not. We show how we might be able to extend the lines to see if they'll intersect. We can identify and draw parallel and perpendicular lines by using their definitions. If a figure has a square corner symbol in one of its angles, we know that the angle is a right angle and the lines that make the angle are perpendicular. We see if we can find some capital letters that have intersecting lines that are perpendicular and form right angles. We see how squares and rectangles contain parallel and perpendicular lines. 4th Grade Math 10.1, Lines, Rays, and Angles https://youtu.be/EzdoXfoz0d0 4th Grade Math 10.2, Classify Triangles by Angles https://youtu.be/o2rfDufQi8Q 4th Grade Math Playlist https://www.youtube.com/playlist?list=PLKi4WTp6PRGX7RhcxctRibNb7V091JZfn I'm using the Houghton Mifflin Go Math! 2015 copyright textbook for this playlist. You can practice online using the textbook's website https://www.gomathacademy.com/ YouTube rating for JoAnn's School videos: L0 - No strong language N0 - No nudity S0 - No sexual situations V0 - Not violent or disturbing D0 - No drug reference or content F0 - No flashing lights content FOLLOW ME: SUBSCRIBE on YouTube TWITTER https://twitter.com/JoannsSchool FACEBOOK https://www.facebook.com/JoAnnsSchool/ MINDS https://www.Minds.com/joannsschool PATREON https://www.patreon.com/JoannsSchool SUPPORT MY WORK: PATREON (one time or monthly) https://www.patreon.com/JoannsSchool PAYPAL (one time) https://www.paypal.me/JoAnnsSchool ... https://www.youtube.com/watch?v=2sdlKeenLLw