intro perimeter and area
Post on 11-May-2015
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Understanding Area and
Perimeter
Perimeter
The distance around the outside of an object.
P E R
I
M
T E
R
E
Perimeterof a Rectangle
10 feet
10 feet
4 ft
How do I measure the perimeter?
Find the total distance around the outside:
Length + Length + Width + Width
10 + 10 + 4 + 4 = 18 feet
4 ft
Perimeter
Examples in the Real World: Fence around a yard
Perimeter
Examples in the Real World: Edges of a picture frame or a table
Area
The space inside of an object. We measure area using square units.
A R E A
Area of a Rectangle
4 feet
3 feet
How do I measure the Area?
Length = 4 feet (4 squares)
Width = 3 feet (3 squares)
This is a 4 by 3 rectangle – like the array.
I can count a total of 12 square feet
Or
Multiply Length x Width
4 x 3 = 12 square feet
Area
Area in square units of different rectangles: THINK - ARRAY
AreaExamples in the Real World:
Total space on the floor inside a room Carpet, Tile Floor
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