1. a = bh/2 2. a = bh/2 3. a = bh/2
=15 x 10 / 2 =24 x 20 / 2 =18 x 32 / 2
= 150 / 2 = 480 / 2 =576 / 2
= 75cm^2 = 240ft^2 = 288ft^2
4. a =12 x 17 /2 5.a=8.5 x 16 / 2 6. a = 15.25 x 18 /2
=204/2 = 136 / 2 = 274.5 / 2
=102in^2 = 68in^2 = 137 1/4 or 137.25in^2