The area of one pennant flag can be calculated using the formula:
Area = 1/2 x base x height
Substituting the given values, we get:
Area = 1/2 x 12 inches x 30 inches = 180 square inches
To find the total area required for six pennant flags, we simply multiply the area of one pennant flag by 6:
Total area = 180 square inches x 6 = 1080 square inches
Therefore, we will need 1080 square inches of wall space to hang six pennant flags.