The use of non-standard units to measure 2D and 3D objects

What is a polygon?

• A figure with straight sides that is open.

• A figure with straight sides that is closed.

• Any 2D shape

• Any 3D shape

Tags

CCSS.2.G.A.1

CCSS.1.G.A.1

Is this a polygon?

• No! It does not have straight sides or edges!

• Yes! It has straight sides and edges!

• No! It has edges that meet at a vertex!

• Yes! It has edges that meet at a vertex!

Tags

CCSS.2.G.A.1

Is this a polygon?

• Yes! It has straight edges and it is an open figure!

• No! It has straight edges and it is a closed fifure!

• Yes! It has straight edges and it is a closed figure!

• No! It has straight edges and it is an open figure!

Tags

CCSS.2.G.A.1

Draw an example of a 2D polygon.

Tags

CCSS.2.G.A.1

Is this a polygon?

• Yes! It is a closed shape with straight sides with two edges that meet at each vertex.

• No! It is a closed shape with straight sides with two edges that meet at each vertex.

Tags

CCSS.2.G.A.1

Can we use different items for units of measurement?

• True

• Fales

Tags

CCSS.2.MD.A.3

Which item do we use our hands as a non-standard of measurement?

• Eraser

• Paperclip

• Horse

Tags

CCSS.2.MD.A.3

Can we use non-standard units of measurement to measure 2D shapes too?

• Fales

• True

Tags

CCSS.2.MD.A.3

Which item is a nonstandard unit of measurement?

• 
• 
• 
• 

Tags

CCSS.2.MD.A.3

I can use goldfish to measure the height of a coke can?

• True

• False

Tags

CCSS.2.MD.A.3