Problem with prescription glasses

I got new glasses. Theu are the ones that get dark. Anyways, when i put them on, i can see better. The only problem is that when i see a piece of paper it looks like a trapezoid. Like when both sides are supposed to be 45 degrees they are less than 45. Do any of you guys know why this happens?

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DuchessOfMapleSyrup · M

are the lenses curved?

Hereagain · 41-45, M

@DuchessOfMapleSyrup how can i tell...they look curved.