Standard Mathematics Primary 5 Area of Triangle

A square of side 12 cm has two diagonals drawn. The diagonals divide the square into 4 identical triangles. A circle is inscribed in ONE of the four triangles, just touching all three sides of that triangle. Estimate the AREA of the triangle (one of the four).

A 24 cm²
B 36 cm²
C 18 cm²
D 72 cm²
Show Worked Solution

Worked Solution

Step 1: Area of the square = 12 × 12 = 144 cm². Step 2: The two diagonals split the square into 4 IDENTICAL triangles. Step 3: Area of one triangle = 144 ÷ 4 = 36 cm². Answer: 36 cm²

Correct answer: 36 cm²

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