- Slides: 16
Lines, Segments, Rays, and Angles
What is a line? “A straight collection of points extending in opposite directions without end” IOW-A line goes on and on without end
What is a line segment? A line segment is a part of a line with an endpoint at each end.
What is a ray? A ray begins at a point and continues in ONE direction without end.
What does parallel mean? Lines and segments that go in the same direction and stay the same distance apart are said to be “parallel”.
What does “intersect” mean? When lines or segments intersect, they simply cross each other.
What does perpendicular mean? Intersecting lines or segments that form “square corners” are said to be perpendicular.
What is an Angle? Angles are formed where lines or segments intersect or where two or more rays or segments begin. An angle has a vertex and two sides. Sides Vertex
What is the vertex of an angle? The vertex of an angle is the point where the two sides meet (the “corner”)
What is a right angle? An angle is named by how “open” it is. An angle like the corner of a square is called a right angle.
What is an acute angle? Angles that are smaller than a right angles are called acute angles.
What is an obtuse angle? Angles that are larger than a right angle are called obtuse angle.
Now that your brain is bombarded with new and wonderful information, let’s see how much you remember!!!!
Show me the following using your Angle. Legs? Parallel Intersection Perpendicular An angle (point to the vertex) Right angle Obtuse angle Acute angle
Now I want to you to draw the following? Draw a line segment Draw a ray http: //www. haelmedia. com/html/sg_m 54_001. ht ml
Now you get to show me ALL your knowledge on the POST-Test that you are going to ACE!!!!! Let’s Begin!!!!