\left(\mathrm{Decimal:\quad }x=-0.75\right)
hope it helps :P
Answer:
5p+s
Step-by-step explanation:
five friends jumping for one hour
First, we have to find the length of each side of triangle. Equilateral triangle means 3 sides r in same length, so each side will be 21 ÷ 3 = 7
Now we need to calculate the height of the triangle. We can do this by Pythagoras theorem
Let the height be h
(7/2)^2 + x^2 = 7^2
The area should be 6.0621778265
Or u can say 6.06 corrected to 3 sig fig
As it stands, it's none of those. I believe you were going for the distance formula but copied it wrong.
