1. A rectangle ABCD is cut into two pieces along the dotted line as shown above. The two pieces are then rearranged to form a right-angled triangle. Find
(a) the area, (b) the perimeter of the triangle.
2.
Another rectangle with dimensions x cm and y cm is cut into two pieces along the dotted line as shown. If the perimeter of the right-angled triangle formed is 70 cm, and x and y are whole numbers, find the values of x and y .