Over the last few weeks students have been studying about 2D and 3D objects. We started this current Maths unit looking at points. We discovered that we can label points with a letter from the alphabet and then we can connect these points using a straight edge to form line segments. Line segments can be parallel (meaning they never touch one another) or not parallel.
We then learned that if we connect line segments to create a closed figure we can create polygons! There are many kinds of polygons – some of our favorites are the hexagon, octagon and the always popular trapezoid and parallelogram. What is your favorite 2D object?
We have been using Innovations Learning’s Shape Facts application to help us learn more about 2D shapes and lines of symmetry:
“When you can fold a shape in half, and one half exactly covers the other half, we can say that the shape is symmetrical. And the fold line is the axis of symmetry.
Some shapes have lots of different axes of symmetry, some have only one, and lots of shapes are not symmetrical at all.”
After exploring 2D objects, we began focusing our attention on 3D objects. We learned that 3D objects have faces. Faces are flat surfaces, like the front or top of a cereal box. 3D objects also have edges that are the lines along which two faces come together. 3D objects also have what are called vertex or vertices which are “points” on a shape or corners where several faces (and edges) come together.
After learning about 2D and 3D shapes/objects, we decided to put our knowledge into action. We used our recycled paper to create 3D rectangular pyramids and cubes. We had a lot of fun making 2D shapes and then transforming them into really cool 3D shapes!