Khan Academy
Khan Academy: Parallel & Perpendicular Lines Intro
Parallel lines never intersect, and perpendicular lines intersect at a 90 degree angle. Learn how to identify parallel and perpendicular lines.
Khan Academy
Khan Academy: Parallel & Perpendicular Lines
Parallel lines are lines in a plane that are always the same distance apart. Parallel lines never intersect. Perpendicular lines are lines that intersect at a right (90 degrees) angle.
Khan Academy
Khan Academy: Drawing Parallel Line Segments
Sal draws parallel line segments with given points.
Khan Academy
Khan Academy: Lines, Line Segments, & Rays
Learn the difference between lines, line segments, and rays.
Khan Academy
Khan Academy: Terms & Labels in Geometry
Learn about geometry terms like point, line, and ray. We will also learn how to label them.
Khan Academy
Khan Academy: Recognizing Angles
Sal identifies acute, obtuse, and right angles in diagrams and pictures.
Khan Academy
Khan Academy: Drawing Acute, Right and Obtuse Angles
Learn how to draw acute, right, and obtuse angles with given points.
Khan Academy
Khan Academy: Acute, Right, & Obtuse Angles
Acute angles measure less than 90 degrees. Right angles measure 90 degrees. Obtuse angles measure more than 90 degrees. Learn about angles types and see examples of each.