Given the triangle [Graphs generated by this script: initPicture(-15,60,-15,60);line([0,0],[25,50]);line([25,50],[50,0]);line([0,0],[50,0]);text([4,25],"40");text([47,25],"12");text([25,-6],"39")], find the area of the triangle. Round your final answer to 1 decimal place.

Area =  `units^2`

Get help: Video

Box 1: Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172
Enter DNE for Does Not Exist, oo for Infinity
Your answer should be accurate to at least 1 decimal places.