Area and Perimeter
Unit Review Sheet
These facts and definitions should be mastered throughout this unit. This page can be used for periodic review and study as you are finishing the unit and in the future.
Facts and Definitions
Lesson 1: Review of Plane Shapes
- Plane shape: 2 dimensional (2D), flat, with only length and width
- Solid shape: 3 dimensional (3D), not flat, has 3 dimensions (height, width, depth)
- Polygon: a closed, plane (2D) shape that is made up of three or more straight sides
- Triangle: a polygon that has three sides
- Quadrilateral: a polygon that has four sides
- Square: a special kind of quadrilateral that has four sides that are the same length
- Rectangle: a quadrilateral whose opposite sides are the same length
- Pentagon: a polygon that has five sides
- Hexagon: a polygon that has six sides
- Octagon: a polygon that has eight sides
- Circle: a closed, plane shape that has only one curved side
- Side: a line that makes part of a shape or polygon
- Vertex: the point where two sides of a shape or polygon meet
- Angle: the space created inside a shape where the sides meet
- A polygon is regular when all of its sides are the same length.
- A polygon is irregular when it has sides that are of different lengths.
Lesson 2: What Is Perimeter?
- Perimeter: refers to the outer edge or boundary of a space or object; it is also the distance around a plane or two-dimensional shape
- To find the perimeter of a polygon, add together the length of each of its sides.
- To find the perimeter of a regular polygon, multiply the number of sides of the polygon by the length of one of its sides.
Lesson 3: Calculating Perimeter
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Lesson 4: More Work With Perimeter
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Lesson 5: Problem Solving With Perimeter
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Lesson 6: What Is Area?
- Area: the measure of space within a plane or two-dimensional shape; the number of square units within a plane or two-dimensional shape
- Square unit: a square whose sides each have a length of 1 unit, used to measure area
- To find the area of a two-dimensional shape, count the total number of square units (square feet, square centimeters, square inches, etc.) contained within the shape.
- sq.: the abbreviation of "square" (e.g., 12 sq. ft or 3 sq. cm).
Lesson 7: Calculating Area
- To find the area of a rectangle, multiply the lengths of one of its long sides and one of its short sides (or its length times its width).
Lesson 8: More Work With Area
- Composite shape: a shape that is made up of two or more basic shapes
- To find the area of a composite shape, add together the areas of each separate shape that make up the composite shape.
Lesson 9: Creating With Perimeter and Area
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Lesson 10: Problem Solving With Perimeter and Area
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Lesson 11: Unit Test
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Final Project: Shapesville
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