PERIMETER OF SQUARE

Perimeter of the following rectangle is 44mm. Find the value of a.

solution

Perimeter = 4 x side

44 = 4(a - 5)

44 = 4a – 20

44 + 20 = 4a

64 = 4a

64 =  4a

 4      4

16 = a

Hence a is 16