The area of a triangle is 216 cm2 and sides are in the ratio 3 : 4 : 5. The perimeter of the triangle is-

Question: The area of a triangle is 216 cm2 and sides are in the ratio 3 : 4 : 5. The perimeter of the triangle is- Solution: 32 + 42 = 52 It is a right-angled triangle.let, the sides 3x, 4x, 5x(1/2) × 3x × 4x = 216 ⇒ 12x2 = 432 ⇒ x2 = 36 ⇒ x = 6perimeter = (3 × 6) + (4 × 6) + (4 × 6)= 72 cm