What is the perimeter of a polygon 15cm 10cm 5cm 10cm?

The perimeter of a polygon can be found by adding all its sides. I.e:
P = a + b + c + d
By condition: a = 15
b = 10
c = 5
d = 10
means:
P = 15 + 10 + 5 + 10 = 40



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