Drawing Angles
... 5. Using a meterstick, draw two rays: one from the vertex through each point. Draw a curved arrow to show the direction of the rotation. Call children’s attention to the sides of the angle. The sides of angles are rays with common endpoints at the vertex of the angle. ...
... 5. Using a meterstick, draw two rays: one from the vertex through each point. Draw a curved arrow to show the direction of the rotation. Call children’s attention to the sides of the angle. The sides of angles are rays with common endpoints at the vertex of the angle. ...
Notes on transformational geometry
... 5. Doing absolutely nothing (i.e., sending every point to itself). This is called the identity transformation. It might not look very exciting, but it’s an extremely important transformation, and it’s certainly 1-1 and onto. All of these kinds of transformations can be applied to R3 (3-space) as wel ...
... 5. Doing absolutely nothing (i.e., sending every point to itself). This is called the identity transformation. It might not look very exciting, but it’s an extremely important transformation, and it’s certainly 1-1 and onto. All of these kinds of transformations can be applied to R3 (3-space) as wel ...
Lesson 15: Rotations, Reflections, and Symmetry
... the other side of the line of symmetry, given by reflecting the point across the line. In particular, the line of symmetry is equidistant from all corresponding pairs of points. Another way of thinking about line symmetry is that a figure has line symmetry if there exists a line (or lines) such that ...
... the other side of the line of symmetry, given by reflecting the point across the line. In particular, the line of symmetry is equidistant from all corresponding pairs of points. Another way of thinking about line symmetry is that a figure has line symmetry if there exists a line (or lines) such that ...
