a square has 4 angles and they’re all 90° and a circle is 360°. now if you add all the 4 90° it all comes out to 360° right? right so does that mean ⬛️ = ⚫️?
The above state tells only about the sum of their angle not about their areas. You are right there sum of angles is same but their areas are different. Let's take another example, rectangle also have sum of angles equal to 90 ° but it's not that rectangle is equal to circle. Square and Rectangle are equal because their areas are same.