Two-Dimensional Vocabulary

• Figure- Another word for shape.​

• Attribute- parts of a shape or figure (number of sides, number of vertices, straight or curved sides)​

• Side

• Vertex/ Vertices​/

  Angles​

Curved Sides

Straight Sides

Vocabulary- Types of Sides

Can you find an example of a straight line or curved line in the classroom?

Irregular

Shapes with non-equal side lengths. (Sides are not the same size)​

Regular

Shapes with equal side length. (Same Size Sides)​

Vocabulary- Types of Shapes

• Curved Sides

• ​no sides

• no verticies​

​​Circle

• Straight Sides

• 4 Sides

• 4 vertices​

​​Square

• ​Straight Sides

• 4 Sides

• 4 Vertices​

​​Rectangle

​

• Straight Sides

• 3 Sides

• 3 Vertices​

​​Triangle

Shapes We Know!

• Straight Sides

• ​4 sides

• 4 verticies​

​​Rhombus

• Straight Sides

• 5 Sides

• 5 vertices​

Shapes We Need to Know!

Pentagon

Hexagon

​

• Straight Sides

• 6 Sides

• 6 vertices​

Polygons

• ​POLY means many

• A polygon is a figure with many sides

• flat/ two dimentional figures

• straight sides

• closed (no open sides)

• Can be regular (equal sides)

• Can be irregular (not equal sides)​

Quadrilaterals

• ​QUAD means 4

• These are Polygons

• ALWAYS have 4 sides

• ALWAYS have 4 angles