Answer:
I think it is y=-3
Step-by-step explanation:
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
I hope this helps you
Volume of cone =1/3.pi.r^2.h
Volume of cone =1/3.3,14.6^2.9
Volume of cone =339.12
Answer:
113.04cm²
Step-by-step explanation:
area of circle= π r²
Area= 6* 6*3.14=113.04 cm²
