Question

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

Answer 1

The total area of the blades is the area of a triangle multiplied by 4.

We have then:

`image`

Where,

b: base of the blades

h: height of the blades

Substituting values we have:

`image`

Doing the calculation we have that the area of the blades is given by:

`image`

Answer:

The total area of the blades is:

`A = 56 feet ^ 2`

Answer 2

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

Total area of blades= Sum of areas of all blades

=Sum of areas of four blades

As, all blades have same dimension

SO, Total area of blades=4*Area of one blade

As, shape of blade is triangle, Area of triangle=
`(1)/(2)`*base*height

Total Area of blades =4*
`(1)/(2)` * base * height

Total Area of blades =4*
`(1)/(2)` * 7 * 4

Total Area of blades =4*
`(1)/(2)` * 28

Total Area of blades =4* 14

Total Area of blades =56 square feet