Question

In the diagram below, BD is parallel to XY. What is the value of x?
Note: BD and XY have the little line over them but I have no idea how to put it.
(Picture below.)

Answer 1

I'd say 55. Am I right? Or it's 125?

Answer 2

HINT: x and 125 are supplementary...

Answer 3

ur correct....

Answer 4

How do I know if they're supplementary?

Answer 5

because it's a straight line

Answer 6

they're a linear pair

Answer 7

It would add up to equal 180

Answer 8

How do I know if I should put 55 or 125 because last time I did a problem like that and the answer was the same as 125.

Answer 9

it's 55

Answer 10

i did the math on that pic i posted

Answer 11

Does it have to do with the lines?
For example this question:

Answer 12

Its the lower angle

(It looks smaller so it has to be 55)

Answer 13

^ The answer for that one was 67.

Answer 14

right, because those angles were alternate exterior angles

Answer 15

Supplementary lines: subtract from 180.
Alternate exterior angles: the same as the other line.
Am I right?
If yes, how do I know the difference from both of the different lines?

Answer 16

that shows congruency

Answer 17

and any angles who are on a straight line add up to 180

Answer 18

because, it's a straight line and straight lines are 180 degrees

Answer 19

does that make sense?

Answer 20

I think so... Okay, let me see if I've got it. Okay, so for that one... That's a Alternate exterior angle?

Answer 21

those are corresponding angles

Answer 22

X is corresponding

Answer 23

they are congruent too though

Answer 24

See... That's what I don't understand. How do you guys know they are congruent.
Sorry. i'm stupid. :/

Answer 25

look at the pic i posted

Answer 26

it shows all angles that are congruent

Answer 27

All lines are 180.

So whenever we have an angles like that they will always equal 180 degrees together

Answer 28

Wait... I'm thinking haha.

Answer 29

Okay, so if they're congruent that means they have the same number right? 110 would be the answer for that one?

Answer 30

yea

Answer 31

Thats right

Answer 32

Okay so for this one it isn't congruent am i right? so the answer would be 75?

Answer 33

those are congruent

Answer 34

they are also corresponding angles

Answer 35

They are corresponding because they are in similar places

Answer 36

AHHHHHHHHHHHHHHHHHHH. I DON'T GET THIS.

Answer 37

:/ i'm not sure how to explain it

Answer 38

Hmm hold on

Answer 39

1 and 5 would be corresponding angles because they are in the same places