Answer:Step-by-step explanation:You are asked to evaluate a mathematical expression involving the formula for the sum of interior angles of a polygon. What's given in the problem The formula for the sum of interior angles of a polygon is \(\left(n-2\right)180\). The value of \(n\) is given as \(\text{30}\). An additional subtraction is given as \(\text{30-180}\). .f5cPye .WaaZC:first-of-type .rPeykc.uP58nb:first-child{font-size:var(--m3t3);line-height:var(--m3t4);font-weight:400 !important;letter-spacing:normal;margin:0 0 10px 0}.rPeykc.uP58nb{font-size:var(--m3t5);font-weight:500;letter-spacing:0;line-height:var(--m3t6);margin:20px 0 10px 0}.rPeykc.uP58nb.MNX06c{font-size:var(--m3t1);font-weight:normal;letter-spacing:normal;line-height:var(--m3t2);margin:10px 0 10px 0}.f5cPye ol{font-size:var(--m3t7);line-height:var(--m3t8);margin:10px 0 20px 0;paddi