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IMAS 2024–2025 — Middle Primary — First Round Question 17

IMAS · IMAS 2024–2025 — Middle Primary — First Round

Question 17

Two identical small squares are placed side by side to form a bigger rectangle without overlapping, as shown in the diagram below.

Question illustration

If AB is a diagonal of the rectangle and $AB=10$ cm, what is the area, in cm$^2$, of one small square?
  1. 10
  2. 20
  3. 30
  4. 40
  5. 50