Lot 21 is a trapezoid with the two bases perpendicular to the road. the scale drawing below uses the scale 1/2 inch = 40 feet. base 1=3.5 inches base 2=5 inches height=4 inches what is the approximate area of lot 21? (1 acre = 43,560 square feet) a 1/2 acre b 2 acres c 2 1/2 acre d 3 acres

Area of trapezoid is given by Area=1/2(a+b)*h
but the scale is:
1/2in=40 ft
hence
1 in=80 ft
the dimensions of the trapezium is:
Base=80*3.5=280 ft
Base=80*5=400 ft
Height=80*4=320 ft
thus the area is:
A=1/2(280+400)*320
A=108,800
but
1 acre=43560 ft²
Thus:
108800 ft²=108800/435602.4977=~2.5 acres

C] 2.5 acres

Hang: ggffhgfgfggccffg

The answer is (a) 12-2(-1)(6)2(6)=12