1: Area and Surface Area Last updated Save as PDF Page ID 35047 Illustrative Mathematics OpenUp Resources Section 1: Lessons Reasoning to Find Area 1.1: Tiling the Plane 1.2: Finding Area by Decomposing and Rearranging 1.3: Reasoning to Find Area Section 2: Parallelograms 2.1: Parallelograms 2.2: Bases and Heights of Parallelograms 2.3: Area of Parallelograms Section 3: Triangles 3.1: From Parallelograms to Triangles 3.2: Area of Triangles 3.3: Formula for the Area of a Triangle 3.4: Bases and Heights of Triangles Section 4: Polygons 4.1: Polygons Section 5: Surface Area 5.1: Polyhedra 5.2: Nets and Surface Area 5.3: More Nets, More Surface Area 5.4: Distinguishing Between Surface Area and Volume Section 6: Squares and Cubes 6.1: Squares and Cubes 6.2: Surface Area of a Cube Section 7: Surface Area No image available 7.1: What is Surface Area? Section 8: Let’s Put it to Work 8.1: Designing a Tent