The answer would be 42 degrees because the total of a triangle is 180 degrees. So you would subtract 180 and 42 (180-42) and that gives you 138 and since the two angles that are touching are the same
First, let's get the perimeter of the rectangle: Then, let's get the area of the bigger one:
Then let's try using a rectangle with a smaller ratio: Then:
If you used a square:
There you have it. A rectangle with a smaller area with the same perimeter. What does it show? The smaller the difference you get from width and length, the larger the area is.