# Area Versus Perimeter

This lesson contrasts area and perimeter, and has varied exercises for the students about both concepts. The lesson is meant for grade 3 or 4.

Some concepts and ideas of this lesson are also explained in this video:

 Sometimes it's easy to confuse perimeter and area. AREA has to do with covering the shape with squares. Your answer will be in square centimeters, square inches, square feet, square meters, or just square units. PERIMETER has to do with “going all the way around.” Your answer will be in some unit of length, such as centimeters, meters, inches, or feet. Area: 4 cm × 8 cm = 32 cm2.Perimeter: 4 cm + 8 cm + 4 cm + 8 cm = 24 cm

1. Find the area and perimeter of the rectangles.

 a. Perimeter = ______________________Area = ______________________ b. Perimeter = ______________________Area = ______________________ c.  4 in. wide, 2 in. tallPerimeter = ______________________ Area = __________________________ d.  A square with 3 cm sidesPerimeter = ______________________ Area = __________________________
 2. Find the area and perimeter of this shape.     Notice that one side length is not given.     You need to figure that out.     Area        Perimeter 4. This is a two-part lawn.     a. Find the areas of the two parts.         _____________ and __________________     b. Find the total area.     c. Find the perimeter. 5. Find the total area of this rectangle,
and also the area of each little part.

Area of each part:

Total area:

This lesson is taken from Maria Miller's book Math Mammoth Early Geometry, and posted at www.HomeschoolMath.net with permission from the author. Copyright © Maria Miller.

#### Math Mammoth Early Geometry

A self-teaching worktext for 1st - 3rd grade that covers basic shapes, right angle, symmetry, area, perimeter, and solids.