BECE Mathematics 2026 Paper

Concept:Find the side of the square from its area, then use the equal perimeter to find the triangle side.Solution:Area of square $= 144 \text{ cm}^2$, soSide of square $= \sqrt{144} = 12 \text{ cm}$.Perimeter of square $= 4 \times 12 = 48 \text{ cm}$.The equilateral triangle has the same perimeter, so$3 \times \text{side} = 48$.Side of triangle $= \frac{48}{3} = 16 \text{ cm}$.Answer:Option B (16 cm)