Question detail
Use a checking method for this problem: final-answer check: a rectangular tile has length 26 cm and width 24 cm. Find its perimeter. State the final answer and verify it against the information in the question.
Try the question, check the answer, then read the explanation to understand the curriculum point.
At a glance
Question
Type
exam_style
Style
Topic
Mensuration and calculation
Question
Use a checking method for this problem: final-answer check: a rectangular tile has length 26 cm and width 24 cm. Find its perimeter. State the final answer and verify it against the information in the question.
Answer
A valid checked answer is 100 cm. The method is: Perimeter measures the distance around the outside of the rectangle. Use 2 times length plus 2 times width. Add 26 and 24. Double 50. 100 cm The final line agrees with the canonical answer.
Explanation
calculator check keeps the canonical answer 100 cm fixed before the model answer is written, so the worked solution and final answer agree.
Common mistake
Circles and composite solids common mistake 1
Writing a final answer without showing the method that justifies it. This can weaken answers for: [Foundation and Higher] Calculate perimeters of two-dimensional shapes, including circles, and areas of circles and composite shapes..
Show the method first, then give the final answer in the required form. Apply this directly to Circles and composite solids.
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