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.

Perimeter = ______________________

Area = ______________________

Perimeter = ______________________

Area = ______________________

c. 4 in. wide, 2 in. tall

Perimeter = ______________________

Area = __________________________

d. A square with 3 cm sides

Perimeter = ______________________

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:

Math Mammoth Early Geometry

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

Download ($5.95). Also available as a printed copy.

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