Plane Shapes and Parts 3rd Grade

All these figures are

• open, not polygons

• closed, polygons

A POLYGON IS:

A figure with 3 or more sides

• True

• False

• not sure

The BLUE DOT on the polygon is...

• a vertex

• a line segment

• an angle

What part is marked in YELLOW?

• line segments

• vertices

• angles

Not a polygon because...

• it has curves

• it has straight lines

• it is NOT closed

Not a polygon because...

• it has curves

• it has vertices

• it has line segments

This figure is a polygon because...

• it is open

• it has curves

• closed with straight lines

The part highlighted in yellow is...

• a vertex

• a line segment

• a vertex

The part highlighted in yellow shows...

• parallel lines

• angles

• vertices

The part highlighted in yellow shows...

• an open shape

• perpendicular lines

• curves