each blade on a windmill is in the shape of a triangle with a base of 7 feet and a height of 4 ft if there are four blades on the windmill what is the total area of the blades

The total area of the blades is the area of a triangle multiplied by 4. We have then: [tex] A = (4) * (1/2) * (b) * (h)
[/tex] Where, b: base of the blades h: height of the blades Substituting values we have: [tex] A = (4) * (1/2) * (7) * (4)
[/tex] Doing the calculation we have that the area of the blades is given by: [tex] A = 56 feet ^ 2
[/tex] Answer: The total area of the blades is: [tex] A = 56 feet ^ 2 [/tex]