On the coordinate plane shown, each grid unit represents 10 feet. Polygon QRST has vertices Q(10,10), R(-10,10), S(-10,-20), and T (10,-20), and represents the floor plan of a room. Find the perimeter and
area of the room.
SO
19
40
30
20
10
R
IR
0
-10
-20
S
IT
-30
40
-50
-50 40 -30
-20 -10
0
10
20
30
40 50
Thone