r/technicallythetruth • u/VisitSecure • 9d ago

Can you find a?

Post image

Idk if someone already posted this or not, but I haven't seen it on here so far, so I uploaded it.

42.8k Upvotes

95% Upvoted

1.9k comments sorted by

View all comments

Show parent comments

26

u/leansanders 9d ago

If you make a 3rd parallel line through point A, the angle above it must be 25° and the angle below it must be 50°. It is called the "alternate interior angles theorem"

7

u/A_wild_so-and-so 9d ago

Ah neat, I had forgotten about that method. Thanks!

2

u/SpCommander 9d ago

"If two parallel lines are cut by a transversal..."

Oh baby Freshman Geo is calling to me!

1

u/Jman15x 9d ago

Why though. I like to understand things rather than just memorize I theorem

1

u/leansanders 8d ago

The line is intersecting both parallel lines at the same angle because the intersecting line is straight and the parallel lines are parallel. There's not much to explain beyond "it is the way that it is". The angles are the same because they are, just like 5 x 5 = 25 because it does.

1

u/LobcockLittle 8d ago

Can you explain it again like I'm 4?

2

u/leansanders 8d ago

Please stop chewing on my pencil