Ageometry student says; "i got lost in that lesson - i wrote down that ad/ab = ac/ab but i have no idea
where it comes from."
which of the following should have been the proportion that the student wrote?
answer choices:
a) ad/ab=ab/ac
b) ad/ac=ab/ab
c) ab/ad=ab/ac
d) ab/ac=ab/ad

Therefore the choice is

a) AD/AB=AB/AC

Step-by-step explanation:

In  Δ ADB and Δ ABC  

∠A ≅ ∠A    …………..{Reflexive Property}

∠ ADB ≅ ∠ ABC      ..............{ measure of each angle is 90° given }

Δ ADB ~ Δ ABC ….{Angle-Angle  Similarity test}

If two triangles are similar then their sides are in proportion.

Therefore the choice is

a) AD/AB=AB/AC

i will pick c put check it over to be sure

step-by-step explanation:

step-by-step explanation:

the true ones are a b and d