Question

find the perimeter of 17m 54cm, 20m 321cm, 24m 5cm 18m 20cm

Answer 1

Sides of the quadrangle:
       17 m    54 cm
   +  20 m  321 cm
   +  24 m      5 cm
   +  18 m    20 cm
 ===============
      79 m   400 cm

Perimeter =  79 m + 400 cm  or  79 m + 4.00 m  
                  = 83.00 meters

Answer 2

Given number of sides = 4

It may be a quadrilateral.

So Perimeter is the length around the figure = Sum of all sides.

Perimeter = 17m 54cm + 20m 321cm + 24m 5cm + 18m 20cm

=79 m 400 cm

= 79+4 m

=83 m.

Perimeter of the polygon with sides 17m 54cm, 20m 321cm, 24m 5cm, 18m 20cm is 83 m or 8300 cm