Mammoth Memory

The total interior angles of a square (or rectangle) = 360°

Each time we add a side (triangle to square, square to pentagon, pentagon to hexagon), we add another 180°. Triangle to square `=180°+180°=360°`

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`90°`

`+`

`90°`

`+`

`90°`

`+`

`90°`

`=`

`360°`


The total internal angles of a square = 360°

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