Question

The figure below shows two triangles EFG and KLM:

Which of the following can be used to prove that triangle EFG is also a right triangle?

Use Pythagorean Theorem to prove that KL is equal to c.
Prove that the ratio of EF and KL is greater than 1 and hence, the triangles are similar by AA postulate.
Prove that the sum of the squares of a and c is greater than square of b.
Prove that the sum of the squares of a and b is greater than square of c.

I'm gonna post the picture

Answer 1

Hey, we can use process of elimination. Here, for a:
Pythagorean Theorem states a^2+b^2=c^2 but ONLY and ONLY applies to a right triangle. Is EGF *DEFINITELY* a right triangle?

Answer 2

no its left

Answer 3

So we can eliminate choice number 1.

Answer 4

okay so now its B C or D

Answer 5

so its for sure not A right?

Answer 6

Not A.

Answer 7

HI!!

Answer 8

why not A?

Answer 9

one on the right is a right triangle, you are told that
so \(a^2+b^2=c^2\) for both

Answer 10

Im not sure he said it's because it's not a right angle idk I'm not great at math as u can see xD

Answer 11

you got the same \(a\) and \(b\) in both triangles

Answer 12

the one on the right has a right angle, so the one on the left gives \(a^2+b^2=c^2\) too

Answer 13

oh ok

Answer 14

besides, the other answers make no sense

Answer 15

so whats the answer? A?

Answer 16

?

Answer 17

whats the answer? /:

Answer 18

hello??

Answer 19

i think it might be A

Answer 20

you sure?

Answer 21

@Billy-Bob

Answer 22

Oh I don't know this

Answer 23

oh u don't know this kind of math ?

Answer 24

@AloneS

Answer 25

A makes more sense than the others but you can chose whatever feels right

Answer 26

i have no idea what feels right

Answer 27

I think A

Answer 28

can u help me with another question?

Answer 29

The figure below shows a trapezoid, ABCD, having side AB parallel to side DC. The diagonals AC and BD intersect at point O.

If the length of AO is three times the length of CO, the length of DC is

three times the length of OC
three times the length of DO
one-third of the length of AC
one-third of the length of AB

Answer 30

i can't decide between B or D

Answer 31

Oh and by the way I *still* don't think the first problem is A...

Answer 32

ok give me a sec

Answer 33

ya im not sure what I'm gonna do with the first question yet

Answer 34

I was AFK sowwz
but the triangle on the left doesn't 100% have a right angle

Answer 35

so wha do u think the first answer is?

Answer 36

First one is Use Pythagorean Theorem to prove that KL is equal to c. I looked it up

Answer 37

oh okay so it IS a?

Answer 38

yes

Answer 39

Thanks so much. can u help me with the second question as well?

Answer 40

second one is c

Answer 41

oh u sure? i think its either B or D?

Answer 42

I got C But you can get a second opinion if you think its B or D

Answer 43

ok