Ex 1) To find the perimeter of polygon ABCDE, we add the lengths of the sides.

P = AB + BC + CD + DE + EA

P = 3 + 5 + 4 + 5 + 7 = 24

The perimeter
of ABCDE is 24 cm.

Ex 2) Consider JKLM with JK = LM and KM = LJ. For one pair of sides JK = LM =

P = JK + KL + LM + MJ

P = b_{1} + b_{2} +
b_{1} + b_{2}

P = 2b_{1} + 2b_{2}

P = 2(b_{1} + b_{2})
**You can use this formula to find the perimeter of any parallelogram.

Now, by substituting L for b