The dimensions of all parts of Triangle B is 4 times that of A A = 1/2 b * h for the given triangle A = 1/2 * 4b * 4h A = 1/2 * 16 * b * h A = 16 * (1/2 * b * h)
The area of the new triangle is 16 times the old. 16 * 15 = 240 cm^2 240 cm^2 <<<<< answer
