To find the minimum amount of material needed to build the sails, we need to calculate the area of each triangular sail and then add them together.
The formula to find the area of a triangle is:
Area = (1/2) * base * height
Let's calculate the area of each sail:
Sail 1:
Base = 24 inches
Height = 56 inches
Area = (1/2) * 24 * 56 = 672 square inches
Sail 2:
Base = 14 inches
Height = 33 inches
Area = (1/2) * 14 * 33 = 231 square inches
Now, add the areas of both sails together to find the minimum amount of material needed:
Total area = 672 + 231 = 903 square inches
Carter needs a minimum of 903 square inches of material to build the sails for his model sailboat.