3. Shape Construction (Play-Doh and straws) To provide students with an opportunity to examine the attributes of a regular and irregular polygon, they will construct one using Play-Doh and coffee stirrers or straws. Materials needed: Play-Doh balls and coffee stirrers or straws (Suggestion: Have one baggie with the same length and one baggie with different lengths.) pictures of 2-D shapes pentagon recording sheet recording sheets labeled 6 12 sided polygons ‒ Display pictures of 2-D shapes. Explain to students that we call these shapes two-dimensional or 2-D shapes because they have no thickness they are flat. The only two dimensions you can — measure are the height and width. A. Show the students how to make a pentagon. They should use stirrers/straws of the same length for all sides. Take one straw and put one Play-Doh ball on each end. Take a side and attach it to a vertex. Take more stirrers/straws and Play-Doh balls to create a regular pentagon. B. Ask the following questions: How many stirrers/straws did we use for the pentagon? 5
3. Shape Construction (Play-Doh and straws) To provide students with an opportunity to examine the attributes of a regular and irregular polygon, they will construct one using Play-Doh and coffee stirrers or straws. Materials needed: Play-Doh balls and coffee stirrers or straws (Suggestion: Have one baggie with the same length and one baggie with different lengths.) pictures of 2-D shapes pentagon recording sheet recording sheets labeled 6 ‒ 12 sided polygons Display pictures of 2-D shapes. Explain to students that we call these shapes two-dimensional or 2-D shapes because they have no thickness — they are flat. The only two dimensions you can measure are the height and width. A. Show the students how to make a pentagon. They should use stirrers/straws of the same length for all sides. Take one straw and put one Play-Doh ball on each end. Take a side and attach it to a vertex. Take more stirrers/straws and Play-Doh balls to create a regular pentagon. B. Ask the following questions: How many stirrers/straws did we use for the pentagon? 5