A triangular prism has side lengths of 5 cm, 6 cm, and 7 cm. If its height is 8 cm, what is the lateral surface area?
Show answer & explanation
Correct answer: A
Explanation
Sides of the triangle = 5, 6, 7 cm
Height of the prism = 8 cm
Lateral surface area = (Perimeter of the base) × Height
Perimeter = 5 + 6 + 7 = 18
Lateral surface area = 18 × 8 = 144 cm²