Answer:
Area of Triangle: 40
a = 1/2 * b * h = 1/2 * 10 * 8 = 5 * 8 = 40
Perimeter of Triangle: 30
add all the sides together: 10 + 18 + 12 = 30
Area of Rectangle: 72 cm^2
a = length * width = 4.5 cm * 16 cm = 72 cm^2
Perimeter of Rectangle: 41 cm
p = 2 (l + w) = 2(16 cm + 4.5 cm) = 2(20.5 cm) = 41 cm
