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

Solution :

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$=\frac{1}{2}*base*height=\frac{1}{2}*7*4 =14 \ ft^2$

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

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