A triangular prism has a base formed by a triangle with side lengths 9 cm, 12 cm, and 15 cm. If the height of the prism (perpendicular to the base) is 10 cm, calculate its lateral surface area.
Show answer & explanation
Correct answer: A
Explanation
Sides of the base triangle = 9, 12, 15 cm; Height = 10 cm
Lateral Surface Area = (Perimeter of the base) × Height
Perimeter = 9 + 12 + 15 = 36
Lateral Surface Area = 36 × 10 = 360 cm²