Question

Riley joins two square sheets to cover her classroom’s blackboard. Each side of the square sheet is 1 m 40 cm long.

Find the perimeter (in centimetres) of the new shape formed.

Answer 1

Answer:

Perimeter = 1.40 + 140 + 2.80 (twice the side as two squares are joined) + 2.80

= 8 m 40 cm

(Perimeter = sum of 4 sides)

Answer 2

Answer:

1.40+1.40+1.40+1.40=5.60

Step-by-step explanation: