Major arc jl measures 300°.

which describes triangle jlm?

a. right
b. obtuse
c. scalene
d. equilateral

This is how i know its D  

It is given in the question that measure of the major arc is

Implies that

Also,  (complete angle)

Putting the value we get

On solving we get

Now in triangle JML

MJ=ML (radius of the circle)

Therefore,

(Angle opposite to equal sides are equal)

Using angle sum property of a triangle that sum of angles of a triangle is

On solving

Therefore all angles of triangle JML are equal to 60 degree

Hence the given triangle is Equilateral triangle

Answer is option D

yes

step-by-step explanation:

easy its decreasing

step-by-step explanation:

because its top point is at the to of the graph on the left side (atleast from the veiw i see it) now if that top point wast in the lower part of the graph it would be increasing hope this have a nice day