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HKIMO 2026 Grade 5 National Final (Heat) Set 05 Question 18

HKIMO · HKIMO 2026 Grade 5 National Final (Heat) Set 05

Question 18

A square and a rectangle have equal perimeters. The rectangle’s length is twice its width, and its area is 72 cm². Find the square’s area.

Source glossary (English–Vietnamese): Perimeter: chu vi; Square: hình vuông; Rectangle: hình chữ nhật; Equal: bằng nhau; Length: chiều dài; Twice: gấp đôi; Width: chiều rộng; Area: diện tích.