Correcting mistakes

This task is about correcting measurement mistakes.

Three students gave incorrect answers to questions about area and perimeter.

Write down the mistake that each student made.

Question 1Change answer

 

Sophie said, "The perimeter of the book is 30 cm."

What was Sophie's mistake?

Question 1Change answer

 

Mike said, "The perimeter of the table top is 6 m."

What was Mike's mistake?

Question 1Change answer

 

Each square of this pattern is 1 cm2. Tom said, "The area of the pattern is 20 cm2."

What was Tom's mistake?

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