Question

What is the perimeter of rectangle JKLM

Answer 1

Find lengths by reasoning shortcut

• JK=6-1=5units
• JM=6-3=3units

Its a rectangle

Perimeter:-

2(JK+JM)=2(5+3)=2(8)=16units

Answer 2

Perimeter = distance around a two-dimensional shape

⇒ Perimeter of a rectangle = (2 × width) + (2 × length)

From inspection of the diagram:

• width = 3 units
• lengths = 5 units

⇒ Perimeter of the rectangle = (2 × 3) + (2 × 5)

= 6 + 10

= 16 units