One side of a triangle is half the longest side. The third side is 8 meters less than the longest side. The perimeter is 47 meters. Find all three sides.

One side of a triangle is half the longest side. The third side is 8 m less than the longest side

Let x, x/2 and (x-8m) represent these sides

x + x/2 + (x-8m) = 42m

Solving for x

5/2x = 50m

x = 20m, the longest side. The other two are 10m and 12m

Three sides are: 10m, 12m and 20m