The perimeter of a right-angled triangle is 78 cm. The lengths of its sides are in the ratio 3: 4 : 6 Work out the area of the triangle.

P1- Find the value of a single unit in the ratio:78/(3+4+6) or (13)= 6
P1- Find the length of the base and the height of the triangle through multiplying the single unit scale by the number of units representing each of the sides:6x3= 18.6x4= 24
P1- Find the area of the triangle:1/2 x 24 x 18
A1- 216HOW TO KNOW WHICH OF THE THREE SIDES SHOULD BE USED TO FIND THE AREA OF THE TRIANGLE?