Find the area of equilateral triangle

3·1/2·4^2·SIN(1/3·360°) = 20.78

 The required area of the given equilateral triangle is 20.78 ft².

Step-by-step explanation:  We are given to find the area of the equilateral triangle shown in the figure.

We know that the area of an equilateral triangle having radius of circumscribed circle equal to r units is given by

For the given equilateral triangle, we have

r = 4 ft.

Therefore, the area of the given equilateral triangle is

Thus, the required area of the given equilateral triangle is 20.78 ft².

v = 1/3 a^2h

step-by-step explanation:

if the height is 57.7cm and the height of the slant edge is 18.2cm, then the volume is 1/3 a^2h.

false

step-by-step explanation:

the reason i say this is because for a certain length of sides you can pick any two and the length is wither equal or greater than the third side and in this case it's not.

3 + 5 = 8

8 is smaller than 9 which is the third side.

hope this : )