The sum of the three angles in a triangle must be . Since this triangle has a right angle, we know that it is °, so the sum of the remaining two angles must be .
We can set up an equation for the two remaining angles to determine the value of :
The perimeter is 28.2 units. I'm not sure about the area.
Step-by-step explanation:
I added up the side lengths that are on the outside of the irregular polygon. I need more time to figure out the area. Hope I was able to help at least a bit.