There is no real answer to that question, unless you typed it in wrong.
X-30+x-30+x=180
3x-60=180
3x=240
X=80
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
12 is a
13 is b
14 is d
15 is 1 217/1250
Answer:
the mean is greater than the median
