PLEASE HELP ME:)))

20. Find the length of BC in the figure below.

Step-by-step explanation:

I'll let you solve it, but I will tell you how to

Ever heard of Thales theorem? If you haven't, here's what it is:

If a line parallel to one of the bases of a triangle is drawn, then the new triangle formed and the original triangle are similar

Why? They are similar because of AA (two equal angles):

∠AEB = ∠ADC since EB and DC are parallel (on a transversal they are corresponding angles which are congruent)

∠ABE = ∠ACD since EB and DC are parallel (on a transversal they are corresponding angles which are congruent)

Now this is enough information to determine that they are similar, but just for good measure, ∠A is common to both triangles so:

∠A = ∠A because of reflexive property

Now that we know they are similar, corresponding parts of similar triangles are similar

Create a ratio and solve is by cross-multiplying

Let me know if you have any questions! Hope this helps! Have a nice day/night :)

i am unable to solve this problem

step-by-step explanation:

step-by-step explanation:

infinity is the answer