The school art club at Bukit View Primary is cutting a triangular cardboard banner. The base QR of the triangle PQR measures 24 cm. The perpendicular height from P to QR is 5 cm shorter than the base. Find the area of the triangular banner, in cm².
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Worked Solution
Step 1: Identify the base and find the height. Base QR = 24 cm. Height is "5 cm shorter than the base", so height = 24 − 5 = 19 cm.
Step 2: Recall the formula: Area of triangle = ½ × base × height.
Step 3: Substitute: Area = ½ × 24 × 19.
Step 4: Compute step by step: ½ × 24 = 12. Then 12 × 19 = 228.
Final answer: Area = 228 cm².
Answer: 228 cm²
Correct answer: 228 cm²
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