What do the closed and open circles on the graph of a step function indicate? Closed and open circles are used to indicate which part of the domain includes the ends of the steps. A closed circle indicates that the x-value is
that part of the domain, and an open circle indicates that the point is
that part of the domain
included in
excluded from

d) by the cross product property, ab^2 = bc multiplied by ad

step-by-step explanation:

we are given

in the given triangle abc

angle a is 90° and segment ad is perpendicular to segment bc

we can see that

triangle(abc) and triangle(abd) are similar because they have common side and same angle (90 degree)

so, triangles(abc) and abd are similar

since, they are similar

so, the ratio of their sides must be equal

we get

now, we can cross multiply

and we get

so, this could be step to prove it