THE ANSWER IS GREATER THAN I TOOK THIS LESSON!
2(5x + 15) + 2<span>(4x + 3) = 360
10x + 30 + 8x + 6 = 360
18x = 324
x = 18
so
RST = </span><span>5x + 15 = 5(18) + 15 = 105
answer
RST = 105 degree</span>
It’s increased to 9. A square is equal on all sides.