Question

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

Answer 1

area of one blade is
A=(1/2)b*h=(1/2)7*4=28/2=14
for four blades
14*4=56

Answer 2

As per the problem we have

Each blade on a windmill is in the shape of a triangle with a base of 7 ft and height of 4 ft.

There are four blades on the windmill.

we have been asked to find the total area of the blades.

Area of one blade
`=(1)/(2)*base*height=(1)/(2)*7*4 =14 \ ft^2\\`

Total are of blades
`=4*\text{Area of one blade}\\`

Total are of blades
`=4*14=56 \ ft^2\\`