Unit 1

Section A: Reasoning to Find Area

• Lesson 1: Tiling the Plane

  Let’s look at tiling patterns and think about area.

  • Lesson Activities
  • Practice Problems

• Lesson 2: Finding Area by Decomposing and Rearranging

  Let’s create shapes and find their areas.

  • Lesson Activities
  • Practice Problems

• Lesson 3: Reasoning to Find Area

  Let’s decompose and rearrange shapes to find their areas.

  • Lesson Activities
  • Practice Problems

Section B: Parallelograms

• Lesson 4: Parallelograms

  Let’s investigate the features and area of parallelograms.

  • Lesson Activities
  • Practice Problems

• Lesson 5: Bases and Heights of Parallelograms

  Let’s investigate the area of parallelograms some more.

  • Lesson Activities
  • Practice Problems

• Lesson 6: Area of Parallelograms

  Let’s practice finding the area of parallelograms.

  • Lesson Activities
  • Practice Problems

Section C: Triangles

• Lesson 7: From Parallelograms to Triangles

  Let’s compare parallelograms and triangles.

  • Lesson Activities
  • Practice Problems

• Lesson 8: Area of Triangles

  Let’s use what we know about parallelograms to find the area of triangles.

  • Lesson Activities
  • Practice Problems

• Lesson 9: Formula for the Area of a Triangle

  Let’s write and use a formula to find the area of a triangle.

  • Lesson Activities
  • Practice Problems

• Lesson 10: Bases and Heights of Triangles

  Let’s use different base-height pairs to find the area of a triangle.

  • Lesson Activities
  • Practice Problems

Section D: Polygons

• Lesson 11: Polygons

  Let’s investigate polygons and their areas.

  • Lesson Activities
  • Practice Problems

Section E: Surface Area

• Lesson 12: What Is Surface Area?

  Let’s cover the surfaces of some three-dimensional objects.

  • Lesson Activities
  • Practice Problems

• Lesson 13: Polyhedra

  Let’s investigate polyhedra.

  • Lesson Activities
  • Practice Problems

• Lesson 14: Nets and Surface Area

  Let’s use nets to find the surface area of polyhedra.

  • Lesson Activities
  • Practice Problems

• Lesson 15: More Nets, More Surface Area

  Let’s draw nets and find the surface area of polyhedra.

  • Lesson Activities
  • Practice Problems

• Lesson 16: Distinguishing Between Surface Area and Volume

  Let’s contrast surface area and volume.

  • Lesson Activities
  • Practice Problems

Section F: Squares and Cubes

• Lesson 17: Squares and Cubes

  Let’s investigate perfect squares and perfect cubes.

  • Lesson Activities
  • Practice Problems

• Lesson 18: Surface Area of a Cube

  Let’s write a formula to find the surface area of a cube.

  • Lesson Activities
  • Practice Problems

Section G: Let’s Put It to Work

• Lesson 19: Designing a Tent

  Let’s design some tents.

  • Lesson Activities