Primary 4 Math Question on Perimeter: Solve Composite Figures Like a Pro

Students in Primary 4 often find questions on the perimeter of composite figures challenging, even when the problem involves familiar shapes like rectangles. Consider this question:

“The figure below is made up of 6 identical rectangles with no overlapping parts. Each rectangle has a perimeter of 42 cm. What is the perimeter of the whole figure?”

At first glance, calculating the perimeter of the composite figure may seem daunting. Many students try to add up all the sides without first understanding the dimensions of each rectangle. The key is to break down the problem step by step. Start by finding the length and breadth of a single rectangle. A critical clue often missed is how the rectangles are stacked, revealing that the length of each rectangle is twice its breadth.

Once this relationship is identified, finding the perimeter of the whole figure becomes straightforward. Approaching the question systematically not only builds accuracy but also helps develop confident, self-motivated learners who can tackle similar mathematics questions independently.

For students seeking instant homework help or on-demand guidance, Superstar Teacher provides solutions that walk through each step clearly. Scroll down to see how a mentor guided a student through this exact problem, demonstrating problem-solving strategies for composite figures.