For triangle 25x7 =175
175/2=87.5 units^2
For rectangle find missing side by using a^2=c^2-b^2 where c is the hypotenuse and a is the missing side
25 squared is 625
7 squared is 49
625-49=576
√576 is 24 the missing side is 24
4x24 is 96 units^2
96+87.5=183.5 units squared
Hope this helps
