Need help please and thank you

Could you take a screenshot this image is quite blurry and I can't see any values and hardly the line. This is not gonna be able to be answered until you fix this.

Step-by-step explanation:

Fix image and I will answer again

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

b). 4320 have a nice day