Exploring Area and Perimeter Perimeter is the distance around. Area is the space inside Is area the distance around the inside space? What makes

area and

perimeter

different? hmm... Find the

perimeters and area of figures on a dot array. use the dot array on your MathBoard or on Centimeter-dot paper Draw a vertical line segment 3 cm long. Now draw a horizontal line segment 5 cm long starting from one end of the 3 cm line. Now draw two more line segments to form a rectangle. What does the perimeter of a figure mean? What is the

perimeter of

our rectangle? How did you

find the

perimeter? How many dots

did you connect

to make a 5 cm

line segment? leave the rectangle

on your dot array and

now draw a square with

each side 1 cm long. You can use this small

square as a unit to

measure the area of a rectangle What is the area

of a rectangle? How can you use

square units to find

the area of a rectangle? Because each side of this square is 1 cm long, it is called 1 square centimeter. The abbreviation is sq cm. If a square

unit has sides measuring 1 inch, what would you call the unit? If a square unit has sides measuring 1 mile, what would you call the unit? Find the area of the 3 cm by 5 cm rectangle? How did you find the area of your rectangle?

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# Exploring Area and Perimeter

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