Compare Rectangles: Testing Congruence of 2×3 and 4×3 Shapes

Rectangle Congruence with Different Dimensions

Are the rectangles below congruent?

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1

Understand the problem

Are the rectangles below congruent?

222333444333

2

Step-by-step solution

We can see that the length is identical in both rectangles: 3=3.

However their widths are not equal, as one is 2 while the other is 4.

Therefore, the rectangles are not congruent.

3

Final Answer

No

Key Points to Remember

Essential concepts to master this topic
  • Congruence Rule: All corresponding sides must be exactly equal
  • Technique: Compare dimensions: 2×3 has width 2, 4×3 has width 4
  • Check: Both length and width must match: 3=3 ✓ but 2≠4 ✗

Common Mistakes

Avoid these frequent errors
  • Thinking rectangles are congruent if they share one equal dimension
    Don't assume rectangles are congruent just because they have the same length (3=3) = wrong conclusion! Having one matching dimension isn't enough. Always check that ALL corresponding sides match - both length AND width must be identical.

Practice Quiz

Test your knowledge with interactive questions

Look at the rectangle ABCD below.

Side AB is 6 cm long and side BC is 4 cm long.

What is the area of the rectangle?
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FAQ

Everything you need to know about this question

What does congruent mean for rectangles?

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Congruent rectangles have exactly the same size and shape. This means all corresponding sides must be equal - both length and width must match perfectly.

Can rectangles with the same area be congruent?

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Not necessarily! A 2×6 rectangle and a 3×4 rectangle both have area 12, but they're not congruent because their dimensions are different. Area alone doesn't determine congruence.

Do I need to check if rectangles can be rotated to match?

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Yes! A 2×3 rectangle can be rotated to become 3×2. So when comparing, check if the dimensions match in either orientation: length×width or width×length.

What if the rectangles look different sizes in the picture?

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Always use the labeled dimensions, not how they appear visually! Drawings might not be to scale. Focus on the numbers: compare the actual measurements given.

How is this different from similar rectangles?

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Congruent means exactly the same size and shape. Similar means same shape but possibly different size. For congruence, dimensions must be identical, not just proportional.

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