Answer: You will need 1080 in²
Explanation:
The formula for finding the area of a triangle is:
Area = 1/2 x b x h
b = base length
h = height
So the equation would be:
1/2 x 12 x 30 = 180
After finding our answer of 180 we multiply it by the amount of pennants we want to hang in this case that number is 6
180 x 6 = 1080
That's how we arrive at our answer of 1080 in².