Video Transcript
Scarlett has sorted these shapes
into polygons and not polygons. Fill in the blank. All polygons are closed and
what. Have more than four edges or sides,
have curves, or have straight edges or sides.
We know that Scarlett has sorted
her shapes into two groups, polygons and not polygons. We’re told that all polygons are
closed shapes. We have to pick another statement,
which is true. Do all polygons have more than four
edges, curves, or straight sides? Let’s check the polygons. Do all of these polygons have more
than four edges or sides? No, they don’t. There’s a triangle. We know that triangles have three
edges or three sides, so we know the first statement is false.
Do all polygons have curves? None of the polygons have
curves. Some of the shapes in the group of
not polygons have curves, but none of the polygons have curves. We know that this statement is also
false. Do all polygons have straight edges
or straight sides? Yes, they do. All of the shapes which Scarlett
has sorted into the polygons group have straight sides. We looked closely at the shapes in
Scarlett’s groups, the polygons and not polygons. All polygons are closed and have
straight edges or straight sides.
Which of these is a polygon?
We’ve learned now that polygons are
closed shapes which have straight sides. This is a closed shape and it has
straight sides. So this is a polygon. This figure is open. It’s not a polygon. This is a curved shape. So it’s not a polygon either. All polygons are closed and have
straight edges. This is the shape which is a
polygon.
