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Mathematics
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Perimeter and Area (1)
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Perimeter
The total length of all sides
Unit of perimeter
According to the unit of the calculated object circumference
Perimeter of equilateral triangle
Perimeter of isosceles triangle

8 cm + 8 cm + 6 cm = 22 cm
Perimeter of right angle triangle

5 cm + 13 cm + 12 cm = 30 cm
Area
The size of the object surface
Unit of area
Square units
Rectangular area formula
Length x width
Right angle triangle area formula
1/2 x length x width
Tips height and base of various triangles
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