Lesson Plan: Combining Triangles

Grade Level: 5th Grade

Subject: Mathematics

Duration: 60 minutes

Introduction: - Begin the lesson by displaying different pictures of triangles on the board or using a projector. - Engage students by asking them to identify the different types of triangles they see. - Explain that today’s lesson will focus on combining triangles to create new shapes.

Lesson Outline: 1. Warm-up Activity (5 minutes): - Provide each student with a sheet of paper and ask them to draw and label different types of triangles they know. - After a few minutes, have students share their drawings with a partner and discuss the similarities and differences they notice.

1. Introduction to Combining Triangles (10 minutes):
   • Display a large triangle on the board and explain that it can be divided into smaller triangles.
   • Demonstrate how to divide the large triangle into smaller ones by drawing lines from one vertex to the midpoint of the opposite side.
   • Discuss the new triangles created and their properties.
2. Guided Practice (15 minutes):
   • Distribute triangle cut-outs or provide students with a worksheet that includes different triangles.
   • Instruct students to combine the triangles to create new shapes.
   • Walk around the classroom to provide assistance and guidance as needed.
3. Questioning (10 minutes):
   • Engage students in a discussion by asking questions such as:
     • What happens when we combine two equilateral triangles?
     • Can we combine different types of triangles to create a rectangle?
     • How many triangles do we need to combine to create a hexagon?
   • Encourage students to explain their reasoning and share their findings with the class.
4. Assessment (10 minutes):
   • Provide students with a worksheet that includes various shapes made by combining triangles.
   • Ask students to identify the types of triangles used to create each shape.
   • Collect and review the worksheets to assess students’ understanding of combining triangles.

Differentiation: - For students who need additional support, provide pre-cut triangles and guide them through the process of combining triangles to create new shapes. - For advanced students, challenge them to create more complex shapes using a specific number of triangles or explore the relationship between the number of triangles and the resulting shape.

Plenary: - Summarize the main points of the lesson by reviewing the different types of triangles and the process of combining them to create new shapes. - Show a video resource to reinforce the concept of combining triangles, such as: - “Combining Triangles to Create New Shapes” by Math Antics: https://www.youtube.com/watch?v=3v2Xw2v5ySQ - Allow students to ask any remaining questions or share any insights they gained during the lesson.

Worksheet Resources: 1. “Combining Triangles” Worksheet: [Insert link to worksheet resource] 2. “Triangle Combinations” Worksheet: [Insert link to worksheet resource]

Note: The worksheet resources can be created by the teacher or sourced from educational websites such as Teachers Pay Teachers or Math-Drills.com.