A rectangle is one of the basic geometric shapes. It has been in use by humans all over the world (e.g. the shape of a wall) since pre-history, and predates any supposed invention of it.
a geometric shape made up of 20 triangles. :)
Circles and rectangles are plane (2-dimensional) figures, so it doesn't seem that they can be used to construct solids.
A polyhedron is a 3 dimensional figure made of polygons. A cylinder is made of two circles and a rectangle around the middle. Since circles are not considered polygons (don't have straight edges), a cylinder cannot be a polyhedron. I just had a discussion about this with my math students today.
it was the Egyptians and Mesopotamians although the Greeks made geometry books that were from the Egyptians.
cylinder
circle based rectangle
A rectangle is one of the basic geometric shapes. It has been in use by humans all over the world (e.g. the shape of a wall) since pre-history, and predates any supposed invention of it.
no, a sphere is a ball.
A cylinder
A cylinder
Cylinder?
a geometric shape made up of 20 triangles. :)
There is not a shape with the most corners. You could always "one-up" the last shape. It is like with numbers, there is not a highest number, but instead there is infinity.
A torus is a pool ring shaped shape. It is made by revolving circles.
A polygon is a geometric form (that is, a shape) that is made of staight lines. It could be a triangle, rectangle, pentagon, hexagon, or many other possibilities. In the U.S., a stop sign is an octogon, or eight-sided polygon.
Simply a line is formed......