Let's gather some line segments vertical to a circumference.
A circle and line segments can be observed from various angles. What kinds of figures can be created?
Let's create three-dimensional figures by moving plane figures parallel!
Let's create three-dimensional figures by rotating plane figures!
Let's create surfaces of three-dimensional figures by moving line segments!
Let's gather line segments vertical to a circumference.
A circle and line segments can be observed from various angles. What kinds of figures can be created?