The two sides of a tringle are 40 cm and 41cm and the perimeter of the triangle is 90 cm. Hence, the third side of the triangle = 90 cm - (40 + 41 ) cm = 90 cm – 81 cm = 9 cm Clearly, ⇒(40)2+(9)2=(41)2 Hence, the triangle is right angled triangle. So, Area of triangle =