Answer:
12cm
Step-by-step explanation:
3cm +3cm +3cm +3cm+9cm=21cm
area of square = side × side
area of rectangle = l × b
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Answers & Comments
Answer:
12cm
Step-by-step explanation:
3cm +3cm +3cm +3cm+9cm=21cm
Verified answer
Answer:
area of square = side × side
area of rectangle = l × b