Equilateral
equi means equal
lateral means sides
all sides are equal
triangle has 3 sides
perimiter=side1+side2+side3
side1=side2=side3
area=1/2 times base times height
base=side
draw a line down the middle of te tiangle so you get 2 right triangles side by side
1/2base is one leg
base is hypotonuse
height is unknown
equilateral means that it is a 30-60-90 triangle with hypotonuse equal to 2x, height=x√3, bottom is x
1/2 times base times height=1959
1/2 times x times x√3=1959
multiply both sides by 2
(x^2)√3=3918
divide both sides by √3
x^2=3918/√3
square root both sides
x=47.5611
side=hypotonuse=2x
2x=2*47.5611
side=95.12222
legnth of each side is

cm or about 95.12222 cm
Answer with Step-by-step explanation:
We are given that


By using formula

By using property:

Divide numerator and denominator by 
Then, we get


Hence, proved
Substitute 
Then we get


Hence, proved.
The answer is E=mc², Einstein's revolutionary formula.
Answer:
A. B. D. NOT C
Step-by-step explanation:
i don't know if you wrote anything wrong but this is correct if you are correct