Question

Which theorem or postulate proves the two triangles are similar?

Answer 1

The two triangles clearly share at least one angle (the one at the top).
They also are not congruent, since they have different side lengths.

Using what we've talked about above, the lower right hand angle is equal in both.

Since all 3 angles add up to 180, that means all three angles are euqal in the two triangles.

That means AAA is correct.

Technically, you do not have the correct answer listed, unless you extrapolate from AA to AAA.

Answer 2

This is same as previous question. I will suggest you try this one
I am not sure you can conclude this with AAA

Answer 3

@thisSucks what should i do exactly?

Answer 4

Thanx @Ashleyisakitty

Answer 5

We will check if ADC is similar to ABC
Now you can see angle A is same for both the triangles.
and we are given sides of the triangles. So we will check if SAS holds true here

Answer 6

you know how to check for SAS here?

Answer 7

before SAS, SSS strikes first here, cuz we're given all sides explicitly

Answer 8

Yeah actually @ganeshie8 is right we can try SSS first

Answer 9

still it doesnt matter, cuz they dont look similar to meh... plz work it and see :)

Answer 10

How do you check for SSS or SAS? :/

Answer 11

find the ratio of all the sides
For trianle to be equal
AB/AD=AC/AE=BC/DE

Answer 12

sorry similar not equal my bad

Answer 13

AB/AD like A*B/A*D right?

Answer 14

I bet you're wonderful in algebra :)

In geometry, AB means 'segment AB'

Answer 15

No AB = lenght of side AB in the triangle ABC which is 14+7

Answer 16

thats AB

Answer 17

21/14=12/8=12/6

Answer 18

perfect ! check if all 3 ratios give the same number

Answer 19

21/14 = ?
12/8 = ?
12/6 = ?

Answer 20

if you get all those 3 ratios same, triangles are similar by SSS.
if not, they're not similar

Answer 21

21/14 = 1.5
12/8 = 1.5
12/6 = 2

So they arent similar.

Answer 22

good job !!

Answer 23

YES!

Answer 24

so.. that means? :x

Answer 25

Some issue with the question text..LOL
these two triangles are not similar that we have already proved

Answer 26

but... the question insists that they are similar!

I can choose from:
AA postulate
AS postulate
SSA postulate
SSS postulate

Answer 27

question is wrong, maybe work wid ur teacher :|

Answer 28

Also, in ur original diagram, u have weird dimensions