Question detail
notation check: a rectangular poster has length 25 cm and width 23 cm. Find its perimeter. Show your working one step at a time.
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
notation check: a rectangular poster has length 25 cm and width 23 cm. Find its perimeter. Show your working one step at a time.
Answer
The final answer is 96 cm. Perimeter measures the distance around the outside of the rectangle. Use 2 times length plus 2 times width. Add 25 and 23. Double 48. 96 cm
Explanation
exam warm-up keeps the canonical answer 96 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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