Yo sup??
we know that area of a triangle is given by the formula
A=1/2*b*h
where
b=lenght of base
h=height of the triangle
in the given figure
h=x
b=5x/6
plugging in the values, we get
A=1/2*x*5x/6
A=5x²/12
Please name the triangle as ABC and you will get full credit.
Hope this helps