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Exploring Area and Perimeter
Transcript of Exploring 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
our rectangle? How did you
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?